(Part 2) Reddit mentions: The best laptop batteries
We found 246 Reddit comments discussing the best laptop batteries. We ran sentiment analysis on each of these comments to determine how redditors feel about different products. We found 128 products and ranked them based on the amount of positive reactions they received. Here are the products ranked 21-40. You can also go back to the previous section.
21. CSEXCEL New Laptop Battery for MacBook Air 13" A1405 A1377 A1496 A1369 (Late 2010 Mid 2011) A1466 (Mid 2012 Mid 2013 Early 2014) [Li-Polymer 55Wh]
Battery Type: Li-Polymer; Voltage: 7.6V; Capacity: 55Wh/7200mAh; 4 cellFIT MODEL: MacBook Air 13 inch A1466 (Mid 2012, Mid 2013, Early 2014, Early 2015 Version), A1369 (Late 2010, Mid 2011 Version A1466 (Mid 2012 Mid 2013 Early 2014 Early2015)), MC503LL/A, MC504LL/A, MC965LL/A, MC966LL/A, MD231LL/A,...
Specs:
Color | A1405 |
Height | 0.1968503935 Inches |
Length | 3.93700787 Inches |
Weight | 0.07 Pounds |
Width | 1.968503935 Inches |
22. GreenBox Innovations New Laptop Battery for Apple A1377 A1369 (Late 2010 Mid 2011 Mid 2012 Mid 2013 Early 2014) Macbook Air 13 inch, also fit A1405 A1466 A1496 661-5731 MC503 MC504 [Li-Polymer / 55Wh]
Battery type: Li-Polymer; Capacity: 55Wh; Cells: 4-cell; Voltage: 7.6V.100% New from Manufacturer. Up to 600 recharge cycles over the life of the battery.Quality: Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability.Warranty: 12 m...
Specs:
Height | 0.3 Inches |
Length | 11.5 Inches |
Weight | 0.63 Pounds |
Width | 5.3 Inches |
Size | 4 Cell |
23. LB1 High Performance Battery for Dell Alienware M11x, M11x R1, M11x R2, M11x R3 Fits 8P6X6, P06T, PT6V8, T7YJR
Battery Type: Li-ion; Capacity: 4200mAh/62Wh; Cells: 8-cell; Voltage: 14.8V100% Brand New from Manufacturer. Rechargeable Up to 500 times over life of battery.Premium Grade A cells ensures peak performance and reliability. Operation time depends on the capacity of the battery, laptop settings, power...
Specs:
Height | 5 Inches |
Length | 8 Inches |
Width | 2 Inches |
Size | 8 Cell |
24. HP Long Life Notebook Battery (HP MU09),Black
Insulating safety wrap is used to enclose the cells
Specs:
Color | Black |
Height | 9.5 Inches |
Length | 2.5 Inches |
Weight | 1.05380961236 Pounds |
Width | 4.5 Inches |
Size | 9 Cell |
Number of items | 1 |
25. ZTHY AC14B8K Laptop Battery for Acer Chromebook 11 CB3-111 13 CB5-311 15 CB3-531 CB5-571 CB5-571-C1DZ CB3-511 Aspire E3-111 R3-131T R5-571T R5-571TG ES1-511 V3-111 V3-371 V5-132 AC14B3K 15.2V 48Wh
Specs:
Height | 1.8 Inches |
Length | 11.9 Inches |
Weight | 0.65 Pounds |
Width | 4.5 Inches |
26. SHARKK Mini Boombox 6W Wireless Bluetooth 3.0 Speaker, Li-ion Rechargeable Battery, Ultra Bass Booster, Powerful Crystal-Clear Sound, Subwoofer Sound Effect / Built-In Mic For Calls / For iphone / iPad / iPad Air / All Phones / Samsung Galaxy Phones and Tablets / Laptops / PC Computers / MP3 Players
Compact design packs a mean punch with dual speakers pumping out 6WBluetooth V3.0 will play audio from connected device in a 50 ft range. Speaker frequency response is 180Hz-18kHzCrystal clear sound enhanced with our Ultra Bass BoosterMake and receive phone calls with the built in HQ MicIncludes: 1 ...
27. ANTIEE A1322 10.95V Laptop Battery for Apple MacBook Pro 13 inch A1278 (Mid 2012 2010 2009 Early 2011 Late 2011) Series 661-5229 661-5557 MD313LL/A 020-6547-A MD101LL/A MB990LL/A MC700LL/A MC374ll/A
- ANTIEE Promise: Each products has undergone rigorous testing to ensure the correct voltage, circuit protection, capacity, stable current, low self-discharge and guaranteed battery life.
- Specification: Voltage: 10.95V. Capacity: 63.5Wh. Battery Type: li-ion polymer. Condition: Brand New. Fully compatible with the originals and more than 500 recharge cycles over the life.
- Compatibility: Fit for 13" A1322 A1278 (Mid 2009, 2010, 2012, Early 2011, Late 2011). Compatible P/N: MB990*/A, MB991*/A, MC700, MC724, 661-5229, 661-5557, 020-6764-A, 3ICP5/69/71-2.
- Expected Run Time: 2.5-5 hours. It depends on the device type, electricity and the way it is used. Grade A cells and PCB ensure fast charges, low power consumption and stable performance.
- Guarantee Return Policy: Repair or replace during the first year. If for whatever reason you are not fully satisfied, please feel free to contact us directly and we'll take actions actively to resolve.
Features:
Specs:
Color | Black |
Height | 0.5905511805 Inches |
Length | 8.267716527 Inches |
Weight | 0.85 Pounds |
Width | 3.3858267682 Inches |
Size | 33YDH 56Wh |
28. NewPower99 Microsoft Surface RT 1516 Battery Replacement Kit with Video Installation DVD, Installation Tools, and Extended Life Battery
Guaranteed for One Full Year4250 mAh 7.4V BatteryRevives Your Microsoft Surface RT 1516 Tablet.Comes with Video Instruction DVD, Special Installation Tools and long life batteryKit Includes Everything You Need to Revive Your Microsoft Surface RT 1516 Tablet
Specs:
Weight | 0.5 Pounds |
29. [6 Cell, 11.10V,5200mAh,Li-ion], Replacement Laptop Battery for Dell Inspiron N5030 Series, Inspiron N5030, Inspiron N5030D, Inspiron N5030R
- Battery type: Li-ion; Capacity: 58Wh; Cells:6-cell; Voltage: 11.1V;Capacity:5200mah.
- High quality grade "A" cells. Charges quickly. Longer discharge time. Steady output and low power consumption. More than 500 times charge-discharge cycles.All products are Certified by CE/ROHS/UL1642/FCC for safety.
- Operation time for standard batteries(6-cell, 5200mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support, 12-month service.
- Compatible Models: For Dell 15R / N5110 / N5010D-148 / N5010D-168 / N5010 / N5010D-148 / N5010D-168 / N5010D-258 / N5010D-278 / 5010-D330 / 5010-D370HK / 5010-D382 / 5010-D430 / 5010-D460HK / 5010-D480 / 5010-D481 / 5010-D520 / N5010R / N5030 / N5030D / N5030R / N5040 / N5050 17R / N7110 / N7010 / N7010R / N7010D laptop battery
- Dell Laptop 14R / N4110 / N4010 / N4010D / N4010D-158 / N4010D158 / N4010D-158 / N4010D-248 / N4010D-258 / N4010R notebook laptop battery Dell Laptop 15R / N5110 / N5010D-148 / N5010D-168 / N5010 / N5010D-148 / N5010D-168 / N5010D-258 / N5010D-278 / 5010-D330 / 5010-D370HK / 5010-D382 / 5010-D430 / 5010-D460HK / 5010-D480 / 5010-D481 / 5010-D520 / N5010R / N5030 / N5030D / N5030R / N5040 / N5050 17R / N7110 / N7010 / N7010R / N7010D notebook laptop battery Dell Laptop 3420 3520 13r battery
Features:
Specs:
Color | Black |
Height | 0.889762 Inches |
Length | 8.421243 Inches |
Weight | 0.69886537054 Pounds |
Width | 2.267712 Inches |
Size | 6 Cell 5200mah |
Number of items | 1 |
30. Replacement Battery for A K 3 K 3 Wi-fi K 3G K Graphite K III Part NO 170-1032-00 170-1032-01 GP-S10-346392-0100 S11GTSF01A
31. [10.80V, 4400mAh, Li-ion], Replacement Laptop Battery for Toshiba Satellite U.
laptop battery
Specs:
Color | Black |
Height | 0.791337 Inches |
Length | 8.07085 Inches |
Weight | 0.937515769155 Pounds |
Width | 1.956689 Inches |
32. Lenovo 0A36307 ThinkPad 9 Cell Extended Life Battery 44++ for Lenovo ThinkPad X220, X230 Models Only. (Caution: Not for X220 Tablet, X230 Tablet Models)
- Lenovo Notebook Battery
Features:
Specs:
Height | 1.1 Inches |
Length | 9.1 Inches |
Weight | 1.1 Pounds |
Width | 2.2 Inches |
Size | 9 Cell |
33. Bull Replacement New Laptop Battery for Apple A1321 A1286 (Only for Mid 2009 2010 Version), fits MB985 MB986J/A MC118 Unibody MacBook Pro 15'' [Li-Polymer 10.95V / 73Wh] with Four Free Screwdrivers
Battery type: Li-Polymer; 10.95V / 73Wh; Battery,package include battery with four Free Screwdrivers!100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery.Replacement For: Unibody MacBook Pro 15'', Apple A1321 A1286 (only for 2009 2010 Version) ,Fit Model: MB985 MB986J/A...
Specs:
Height | 1.5 Inches |
Length | 12.5 Inches |
Width | 4.5 Inches |
34. ATC Li-ion Battery Fit IBM ThinkPad R400 7443, Thinkpad R400 Series, ThinkPad R61 7732, ThinkPad R61 7733, ThinkPad R61 7734, ThinkPad R61 7735,compatible PN.42T5225,42T5227,42T5229,42T5262,42T5264,41U3197 brand new
- 100% Compatible - Will not void your original warranty
- Tech Rover™ Quality product with 30-DAY Worry-Free Return Policy
- Brand New High output Battery
- All Tech Rover™ branded items carry a 1 year warranty against manufacturer defects.
Features:
35. TE03XL 11.55V 61.6Wh Battery for HP Pavilion Notebook PC 15 Omen 15-AX033DX 15-AX000 Series 849910-850 HSTNN-UB7A 849570-541 849570-542 849570-543 TPN-Q173
- Battery type: Li-ion; Voltage: 11.55V; Capacity: 61.6Wh/5150mAh; Cells: 3-Cell
- Compatible Models: HP OMEN 15 PC Series; HP Omen 15-AX033DX; HP Pavilion 15 UHD Series; HP OMEN 15-AX000 Series
- Replace Part Numbers: TE03XL, HSTNN-UB7A, TPN-Q173, 849570-541, 849570-542, 849570-543, 849910-850, TE03061XL
- 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. The actual operation time will depend on how much electricity is required by the device and how you use it
- For first use, please discharge the battery to 5%(not to 0%) and then charge to 95%, and cycle 3-4 times.
Features:
36. Amsahr Replacement Battery for Lenovo ThinkPad X220, X220i, 0A36282, 42T4861, ASM 42T4862 - Includes Mini Optical Mouse
- Includes Mini Optical Mouse with Retractable USB cord and ONE Compatible Laptop Battery
- 18 Months Manufacturer Warranty, 100% Compatible Non-OEM : Lithium Ion (Li- ion) Long Life Battery: Rechargeable with No Memory Effect and Power Surge Protection.
- 6600 mAh, 11.1 Volts & 9 Cell
- Protective Retail Packaging, Each Product is Sealed with Anti-Static Shield Sleeve.
- Exclusive Offering of High Performance, Long Lasting, and Durable Grade A Cell Battery
- Includes Mini Optical Mouse with Retractable USB cord and ONE Compatible Laptop Battery
- 18 Months Manufacturer Warranty, 100% Compatible Non-OEM : Lithium Ion (Li- ion) Long Life Battery: Rechargeable with No Memory Effect and Power Surge Protection.
- 6600 mAh, 11.1 Volts & 9 Cell
- Protective Retail Packaging, Each product is Sealed with Anti-Static Shield Sleeve.
Features:
Specs:
Height | 4.5 Inches |
Length | 12 Inches |
Weight | 0.992080179 Pounds |
Width | 1.75 Inches |
Size | 9 Cell |
Number of items | 1 |
37. E EGOWAY Replacement Battery for MacBook Air 13 inch A1466 A1369, fits A1377 A1405 A1496 (55Wh-7200mAh)
Battery Type: Li-Polymer; Voltage: 7.6V; Capacity: 55Wh/7200mAh; 4 Cell.Compatibility: Made for Apple's 13 inch MacBook Air A1466 (Mid 2012, Mid 2013, Early 2014, Early 2015 and 2017 Version), A1369 (Late 2010, Mid 2011 Version), MC503LL/A, MC504LL/A, MC965LL/A, MC966LL/A, MD231LL/A, MD232LL/A, MD76...
Specs:
Color | Black |
Height | 0.2362204722 inches |
Length | 11.3779527443 inches |
Weight | 0.63 Pounds |
Width | 5.3149606245 inches |
Size | 4 Cell |
38. Bay Valley Parts 55WH Battery for Apple MacBook 13" A1185 A1181 MA561G/A MA561FE/A MA561LL/A MA566 MA566FE/A MA566G/A MA566J/A White (Mid./Late 2006, Mid./Late 2007, Early/Late 2008, Early/Mid. 2009)
- Battery type: Li-Polymer; Capacity: 56Wh; Cells:6-cell; Voltage: 10.8V;Capacity:5200mah.
- High quality grade "A" cells. Charges quickly. Longer discharge time. Steady output and low power consumption. More than 500 times charge-discharge cycles.All products are Certified by CE, ROHS,UL1642,FCC for safety.
- Operation time for standard batteries(6-cell, 5200mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support
- Compatible Models: For Apple MABOOK PRO 13" MB062CH/B MacBook 13" Pro MB881CH/A MacBook 13" A1181 MacBook 13" MA254 MacBook 13" MA254*/A MacBook 13" MA254B/A MacBook 13" MA254CH/A MacBook 13" MA254F/A MacBook 13" MA254J/A MacBook 13" MA254LL/A MacBook 13" MA254SA/A MacBook 13" MA254TA/A MacBook 13" MA254X/AMacBook 13" MA255 MacBook 13" MA255*/A MacBook 13" MA255B/A MacBook 13" MA255CH/A MacBook 13" MA255F/A MacBook 13" MA255J/A MacBook 13" MA255LL/A laptop battery
- Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed as following.
Features:
Specs:
Color | gray |
Height | 0.586613 Inches |
Length | 8.303133 Inches |
Width | 3.039364 Inches |
Size | 6 Cell 5200mah |
Number of items | 1 |
39. A1405 A1369 Laptop Battery for Apple MacBook Air 13 Inch A1466(Mid 2012 Mid 2013 Early 2014 Early 2015) A1369(Late 2010 Mid 2011),Fits A1377 A1405 A1496 661-5731 MC503 MC504 020-7379-A
- Made of cotton, which has breathable air holes at the palm so it's comfortable to wear, great for summer ourdoor hands protection.
- Total length 9",middle finger length 3".Made of stretchable material fit for most women and girls.
- The sunblock gloves have silicone print on palm and fingers to add more friction for easy grip steering wheel and meantime stop your hands from slipping around.
- These sun gloves are perfect accessories when driving, the grip on the gloves is very helpful
Features:
Specs:
Height | 1.1 Inches |
Length | 11.8 Inches |
Weight | 0.88 Pounds |
Width | 6.2 Inches |
Size | 4 Cell |
40. Replacement Battery for Apple MacBook 13" A1181 A1185 MA566 MA561 MA254 MB402 White
- Rating : 10.8V ~ 55wh
- Battery Type: Rechargeable Li-ion Battery
- Package Includes: 1 pc laptop battery
- Warranty:12 months warranty, Ship from CA US, Fast customer service!
Features:
Specs:
Weight | 0 Pounds |
🎓 Reddit experts on laptop batteries
The comments and opinions expressed on this page are written exclusively by redditors. To provide you with the most relevant data, we sourced opinions from the most knowledgeable Reddit users based the total number of upvotes and downvotes received across comments on subreddits where laptop batteries are discussed. For your reference and for the sake of transparency, here are the specialists whose opinions mattered the most in our ranking.
I’ve had decent luck with parts I’ve bought from iFixit. I’m guessing this one for an 11” or this one for a 13”. Without your exact model number I’m not sure. They are certainly a bit pricier than you can get them - and I do know they at least stand behind the products they sell. I’ve bought phone batteries from them in the past with good luck.
Amazon has several well rated kits as well that are in the ~$50 range as well:
And the batteries off Amazon are hit or miss. I’ve replaced a few MacBook Pro batteries out of the 3 or 4 I’ve replaced one needed to be replaced.
BTW have you run any of the diagnostics on your MBA? https://support.apple.com/en-us/HT204054. 70 cycles is a bit low, unless you’ve let the battery go extremely low. Sometimes just flashing the SMC will get it to charge again - it will take a few cycles for it to get full charge again.
I replaced my mid 2012 13 inch MBA battery myself and it was super easy. Took maybe 10-15 mins. I ordered this battery off of Amazon and it's been working great since, about 3 months now. It also comes with the tools you need.
It's still not going to make a huge difference in performance, though again I have the i7 already and find the performance acceptable for some basic gaming so have no experience with the i5. It'd probably be a decent enough upgrade to make it worthwhile, and reasonably easy.
I replaced the battery on mine about 2-3 years ago, but it rarely runs on battery. I do remember getting 2-3 hours out of basic web surfing and office use but not sure how well it'd do when gaming. You can find batteries on Amazon.
You might also want to replace the wifi card; it's easy and can greatly improve the performance over the card that was provided.
ah, good good. Sorry if it seemed patronizing, I just never really know what anyone's knowledge/experience is with this stuff, if any. Seems like you know what you're doing though.
How are the rubber feet on the underside? if they've gon missing, that can cause the machine to sit too low on the surface, not allowing enough airflow underneath. Maybe adding some thicker feet like these sticky ones would help, or suggest a "extended battery" like this (not that specific one, just an example), those kinda prop up the back, allowing for better airflow when the cooling pad isn't around.
Okay here is the battery that should be in your laptop.
here is a guide to how to access it.
I hope that helps. You can buy a backup whenever you want and have it on hand just in case.
I stumbled across this brand a while ago, and because the price was right I purchased their speaker. It was by far one of the best purchases I have ever made. The sound is crisp, clear and loud. The speaker has a built in subwoofer of sorts for added bass. It is incredible for the price and size. Highly recommend.
http://www.amazon.com/dp/B00DQ7W16U
If you are looking for something a little bigger I would try these speakers also by the same brand:
http://www.amazon.com/dp/B00JZUMSEC
http://www.amazon.com/dp/B00ES2BQ7M
Is your MBP a 13 inch? I bought this battery for my 2010 13 inch MBP and It just like the original battery. It also has good reviews on amazon and when I checked fakespot.com the company as well as the listing for this battery got a A+ rating which is really rare. https://www.amazon.com/dp/B01CQBHUP8/ref=cm_sw_r_cp_apip_zllP4V9JKpQjI
I suppose it could be something else, but everything I've found online (for example) that isn't just parroting the ineffectual official support indicates that a charger that won't even light up most likely means a faulty battery rather than a bad charger.
As I said, I did this myself albeit on a Surface RT 1. I bought this, which comes with all the tools you'll need (screwdriver and plastic spudger; you might want to buy a couple of extra spudgers since they get pretty chewed up trying to pry stuff apart) and a video that was sufficient for me to figure out how to do it. I only lost one or two screws in the process, which is a pretty good average. Just make sure you buy the right battery for a Surface RT 2 and you're good to go.
I seriously, super, really need this / and this for extra awesomeness
My laptop cord is busted and can't charge my laptop, only keeps it alive. And when its plugged in it runs like dial up and if it unplugs it dies completely. Its driving me insane lol
Where's the aspirin
Replacement battery. Takes about four minutes to deinstall/reinstall.
I don't know if my battery is good or not. Replacing the battery didn't recover my Kindle (similar issue). However, I ordered a replacement battery from Amazon and when it didn't work they gave me a full refund.
The replacement you need is this one. Let me know if you need a walk through on putting it in. It's pretty easy but if you haven't done that sort of thing before it helps to have a guide.
>play fallout four
>battery life would like at least 10 hours
Let's say that Fallout 4 draws 100 Watts to run. I've measured mine using 165W to run MGSV, but it has a desktop CPU so most laptops will be much less.
100W for 10 hours is 1000Wh, if my understanding of electricity holds, which is verrrry unsure. My battery says it outputs at 10.8V, so let's use that.
Plugging into this site, that's about 90Ah. The above linked battery is 4.4 Ah.
So, the laptop would last about half an hour at a sustained 100W draw.
I'm not at all confident that I did all that math correctly, since it has been a long time since college, but the point is; no laptop can play FO4 for 10 hours on battery. I doubt there are any that can play at >30fps for three hours. You'll definitely need a battery bank for that, which I don't know anything about but this seems like a place to start.
Sorry to not have any actual help to give you, but I saw an opportunity to temper expectations and took it.
tldr No gaming laptop can last 10 hours and play games during that time, battery technology is nowhere near there yet. Consider buying a power bank.
I'd recommend getting the 44++ battery which is the 9-cell battery that's compatible with the X220. This is the same battery sold on Amazon.
There are good deals online for ThinkPad batteries, but be careful that you're getting OEM batteries; non-OEM batteries tend to cheaply made and don't last as long as OEM batteries. Always check the seller's reviews to make sure they're not substituting with non-OEM units.
That model has a battery you can replace. You can buy one from amazon or other sources. When we looked for ours it was around 80 dollars for the battery.
BULL Replacement New Laptop Battery for Apple A1321 A1286 (Only for Mid 2009 2010 version), fits MB985 MB986J/A MC118 Unibody MacBook Pro 15'' [Li-Polymer 10.95V/73Wh] with four Free Screwdrivers https://www.amazon.com/dp/B01FJBDCFO/ref=cm_sw_r_cp_api_kEEXBbBRNE7FY
Link added for clarity. Cost has gone down since I looked. Now between 40 and 60 dollars.
The CPU is the Intel® Core™2 Duo CPU T9400 @ 2.53GHz × 2.
The battery and memory I'm planning on purchasing include:
6 Cell ATC Li-ion - $19.99 + Free Shipping
8GB Kit (4GBx2) Upgrade for a Lenovo ThinkPad T400 Series System (DDR3 PC3-10600, NON-ECC, ) - $44.94 + $3.99 Shipping
In terms of selling the complete laptop, I see sites like: http://www.laptoptraderxpress.com . I've never used such services before. Does anyone have experience with him? Any tips or recommendations to similar sites?
[edit]: Whoa, after doing a quick search on my own question, I've found I've entered a whole new world of selling parts vs. whole systems, Clevo laptops, etc. Now I wonder if I could ever salvage my laptop for parts to make a new one.
The person who owns the laptop found a link to it off of HPs support site to Amazon. The links for both are below. Just not sure if its a laptop issue or battery issue to be honest.
https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/Where-to-buy-Battery-Spare-Part-Number-849910-850/td-p/7013330
https://www.amazon.com/TE03XL-15-AX033DX-849910-850-HSTNN-UB7A-849570-541/dp/B07CZFB12X
Edit: if you think its just the battery then there are other options online, Newegg, BattDepot, ebay, Walmart.
I found two different batteries on Amazon that work with Amazon Prime that are pretty cheap compared to the others.
6 cell
9 cell
https://store.rossmanngroup.com/index.php/j3-j4-a1496-battery.html
Interesting. Nothing on this listing for Macbook batteries he has in stock indicates they are used.
And here's a legitimate reseller on Amazon, which sells "Egoway brand" batteries FOR Macbooks. (no affiliation)
https://www.amazon.com/Egoway-Replacement-Battery-MacBook-7200mAh/dp/B01DMDH64O
It surprises me to see so many commentors not seeming to understand the legal distinction.
I bought a new battery for my 2009 MacBook a couple of years ago. It works great because the last battery would not hold a charge. It was about $20 on Amazon.
55WH battery for Apple MacBook 13" A1185 MA561FE/A MA561LL/A https://www.amazon.com/dp/B0045XX12C/ref=cm_sw_r_cp_api_CnTPAbRB8FDDE
The legacy Airs have easy to replace batteries if you have the proper screwdriver bits.
This one should fit: https://www.amazon.com/dp/B0796QX9LK/ref=cm_sw_r_other_apa_i_MZvRCbHN9YE3M
I bought this battery a half year ago and it's doing pretty well.
It's definitely not as good as the battery that Apple sells, but it's affordable and does what it needs to. I get around 3hrs of battery life on it.
I need these poly zip bags to put at each desk in my room and put materials in so my students can have them on-hand instead of having to distribute them every time we need to use them.
OR If you want something more personal, the battery on my mac doesn't charge any more, which is why I'm always on mobile, so I really need this new battery