The Jamstik 7 uses AA batteries, and the included batteries are NOT rechargeable. However, you may utilize rechargeable AA batteries like those sold here on Amazon.
Please make sure to read the below instructions.
DON’T—Mix old and new batteries, batteries of different brands, or batteries of different types in the same device as this may cause the batteries to leak.
DON’T—Attempt to recharge non-rechargeable batteries. This can cause your batteries to overcharge or leak.
Recycling: Alkaline batteries can be safely disposed of in normal household waste, everywhere but California. We however strongly recommend for these to be disposed at a recycling station. Go to: https://www.call2recycle.org/ to find a recycling location near you.