Hers an odd one
https://www.ebay.co.uk/itm/Portable...179560?hash=item363d72fb28:g:KXUAAOSwlKlbvA5a
its a cable to charge 18650 or CR123 batteries or similar
however it also acts as a battery bank if you have a fully charged battery in.
So what I do is rip open old laptop batteries, which usually have 12 to 16 18650 batteries in, each holds 3000mah
so for £7 i made a 48,000 mah battery bank.
just need to swop out batteries as they get used up, which also emans that you only need to take what you need.
i might store mine in a molle shotgun shell pouch at some point.
if im just playing pokemon go then i just strap the cable and battery to wrist.
Better option from a reliable manufacturer, though it’s not a power bank. It’ll charge anything from an Eneloop type 1.2V to a 4.2V lithium ion, reads the voltages and shuts off when full.
https://www.amazon.co.uk/Universal-...ocphy=9045777&hvtargid=pla-563119718089&psc=1
Personally I wouldn’t harvest batteries from old laptop packs and assume mAh. I buy batch tested, high draw 18650s from Fogstar as I have several multicell torches and a couple of vape mods needing power. No affiliation, just a recommended company doing good things regarding battery safety.
If anyone is after an AA EDC torch.
Amazon seems to have the Lumintop Tool AA 2 kit at £16. Light, 14500 battery (tech details says battery is included) and magnetic base.
For price comparison,. it's on sale on Lumintop's Aliexpress store for £18 (down from £23)
Unfortunately I bought one beginning of the year when it was more expensive and didn't come with the mag base tail. Typical
https://www.amazon.co.uk/Torch-Smal...07X3BMZXS/ref=pd_sbs_60_1/261-4159556-0076056
Edit: Not certain it's a micro USB rechargeable battery. One I got was. And the pic shows a different sleeve design.