We recommend purchasing a battery of the same size from a local store if possible, as shipping lithium batteries often includes additional logistics costs, which can increase the final price. The replaceable LiPo battery used in most sabers is an 18650 flat-top, unprotected battery with a 65 mm length, making it compatible with all standard lightsaber cores. Battery Options 18650 Battery (Standard Saber Core) Type: 18650 LiPo Top: Flat-top Protection: Unprotected Length: 65 mm Compatible with most lightsabers The latest battery versions include an additional protection layer, helping reduce the risk of short circuits and improving overall safety. Recommended Capacity by Core Type RGB Core: 2000 mAh battery is sufficient. Neopixel Core (SNV4 Pro & Proffie): 3200 mAh battery is recommended for optimal performance and longer runtime. No matter which capacity you choose, this reliable rechargeable LiPo battery will keep your saber powered and ready for action. It’s also a great backup battery for extended saber use. Important NoticeAccessories and service add-ons are final sale and are not eligible for return or exchange. We recommend confirming compatibility before placing your order. If you need assistance, our support team is available to help.