yes but it's not original
i mean in modern bluotooth speaker you have so li-ion or li-po batterys
so just take your off and check the numbers on there (and post foto)
it should say
-type
-number of cells
-capacity
than you can go to ebay and just search for simmilar one or maybe even the same (justr ask here before buying)
or just post here your results and we'll check some on ebay
also don't buy cheapest $@$* you can get hold on