LiPo batteries

I use 2S LiPo batteries. Nominal voltage is 7.4v. Fully charged is 8.6V. You can use them down to about 6.3v.

Tattu 450mAh
www.amazon.com/gp/product/B07K18DJG5/ref..._title?ie=UTF8&psc=1


Google XT30 connectors. You can get them on Amazon or eBay
www.amazon.com/gp/product/B074S7NH3H/ref..._title?ie=UTF8&psc=1

There is a variant with JST type connectors, but I don't use them, as they strike me as fragile.

And a Lipo balance charger, such as
Tenergy Balance Charger or

www.amazon.com/Battery-Charger-Discharge...id=1594164704&sr=8-3

The charger can charge other types of rechargeable as well.

They are fussy. If you over discharge them, they become unusable.

Store them in an insulated bag. Don't leave unattended from charging. I have never had any overheating events. I have killed some from over discharging