DC 8.4V 6400 mAh Battery Pack & Pouch Rechargeable For Bike LED Light Head Lamp

Pouch with Velcro can be tied on waist belt or bicycle handlebar. Suitable for LED Head Lamp / Bike Lamp. Suitable for 8.4V Head Lamp / Bike Lamp. 4led of 3hours,5led of 3hours;6LED OF 2.5 hours;7led-2hours-8led of 2hours,9led-2hours,10led of 2hours.

eBay