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Hi! Your speaker's internal battery size is: Battery Size: 3.7V,1800mAh*2 in parallel. Have a great day. Regards, Daniel T. - Insignia Support
Sorry, there was a problem. Please try again later.While I can't say the battery's exact size, I can say it can completely charge several devices before going dead. It's an excellent speaker for the money.
Sorry, there was a problem. Please try again later.It's a rechargeable battery so it should work for a long time as long as you keep it consistently charged.
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