Reddit mentions: The best c batteries

It wasn't horrible battery life, but it wasn't great like my T2, which has battery life measured in years.

It's kinda confusing at first, the XPS2 & EXPS2 are the non night vision models with the CR123 batteries. The "E" models have a riser plate for clearing something like laser device. The XPS3 & EXPS3 are the night vision compatible models. The number after the model number, like if it says XPS2-0, is the designator for the reticle.

I picked the XPS2 originally because i had other gear (my headlamp & M300) that used the CR123 battery as well. I rather have one battery type if possible in my bag, as opposed to having to remember to bring multiple types of batteries.

If you get one that uses CR123 batteries, get a 12 pack on Amazon like this one, it'll be much cheaper than buying them in store at Walmart or Walgreens. If you go that route, get a battery caddy to keep things organized in your range bag.

Hope that helps a bit!

> but I'd ideally like to do whatever that guy in the video did, because whatever he did it works.

He probably had the parts on hand. To replicate what he did, you'll need 4 C-sized NiMH batteries at $18 plus a charger for $20.

It's difficult to estimate your power requirements because on top of the Pi/modem/i2c sensor, you'll have high-power IR leds, a camera, etc.

I recommend you build a prototype first, running from DC power, then get something like this USB meter, and let the prototype run for 12 hours or so at night. That will tell you the power usage, and in turn what kind of batteries or battery packs you need.

> complete noob in the matter.

You and me, both!

Welcome!

Two important things I learned here:

• The incredible value and functionality/performance that Li-ion batteries bring.
  
  
• How generally overpriced and underpowered retail lights are, compared to the value and performance of companies like Convoy, Wowtac and Thorfire. (Those are just the ones I have first hand knowledge of)
  
  Looking at my Amazon history, these were the batteries I ran in my pre /r/flashlight flashlights. Never again!

Thanks! I like your 17 as well, and I'm sure you like the 650 lumens you're pushing out of that 1HL.

http://www.amazon.com/Surefire-Pack-Boxed-Lithium-Batteries/dp/B0035HB694

I found these at a decent price. Good suggestion.

Prime item: http://www.amazon.com/dp/B0041TF5KQ/ref=gl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=I5MEMK0MR8B9&coliid=IL8EDZAS5G124

I prefer this non-Prime item. With shipping it's under $10: http://www.amazon.com/dp/B004DRMUVI

Song: Selena Gomez - The Heart Wants What It Wants

Shelf life on lithium primaries is about 10 years...

Don't usually recommend their flashlights, but I do like their batteries, and this is a pretty damn good price on these Surefires.

What about elb? They seem to have good reviews.

https://www.amazon.com/gp/aw/d/B00FHVP5OI/ref=ox_sc_act_image_1?smid=A3P4UZIS42PRQV&psc=1

Why don't you use rechargeable C batteries ?

Some thing like this They http://www.amazon.com/EBL-5000mAh-Ni-MH-Rechargeable-Batteries/dp/B00FHVP5OI/ (random result from Amazon).

Quick search on Amazon yielded this item. Do you think it would save the problem?

https://www.amazon.ca/Pack-Volt-Batteries-Ideal-Assembly/dp/B01LVTY6DU/

Well, two months later, but... you can buy batteries for these still.

https://www.amazon.com/Replacement-Battery-Jawbone-8390-KA02-0580-ICR18650F1L/dp/B07PW65H7M

If you really need as much capacity as possible, go for the Tenergy Premium cells; they're 5000 mAh. They're not low self discharge, though, so they'll lose charge pretty quickly. If you need capacity and low self discharge, the 4000 mAh Tenergy Centura cells should work for you.

https://www.amazon.com/EBL-Rechargeable-Batteries-5000mAh-Ready2Charge/dp/B00FHVP5OI/

There are NiMH rechargeable C batteries. These performed decently well in this test. Runtime at low outputs will be less than alkalines, but high-output performance will be much better.

There have been some reports of lights using C batteries that can be damaged as a result of the higher performance of NiMH rechargeables. What light do you have?