The Lightest 300mAh BT2 with a Cap

8.00706 GRAMS

Thanks to our custom battery cap (first released in November 2025) we've been able to drop the weight of the highest-quality 300mAh cells down to an average weight of 8.00706g. Snoop around, no other 300 BT2 with a Cap is lighter. I think the only comparable battery that is lighter is out very own 300mAh Pigtail battery.

 These are the top of the line batteries for Tiny Whoop aircraft. They're the newest generation of folded-cell 1S packs, delivering a higher discharge rate compared to previous Tiny Whoop packs, averaging approximately 30 or 40 extra seconds of flight time! Because TinyWhoop.com goes thru SOOO MANY of these batteries, we are almost always the place to get the freshest packs, and FRESHNESS MATTERS!!!

Check out the new (REMOVABLE) weight-saving micro labels!