Replacement Torch Batteries
PTI Photopuncture Torches use a 18650 3.7V Li Ion 2600mAh rechargeable battery (high-drain).
These can often be purchased from battery outlet stores. Or you can find them in the accessories section of the LightTherapyTools.com store. PTI cannot ship just batteries internationally.
The best prices we have found have been on Amazon and Wish.com