Your lithium battery is fully charged, can be in the form of rechargeable mobile power to Bluetooth speakers power supply and charging, to provide power to the small speakers.
If there is a hands-on transformation ability, like the square dance speakers, it is possible to transform the lithium battery into a lithium battery power supply, usually square dance speakers internal 12V single battery or dual 12V dual battery power supply, you can use 3 lithium batteries in series to meet the need for 12V power supply.
Often lithium batteries are used in three strings of five parallel, a **** 15 lithium batteries to replace an ordinary lead-acid battery,
of course, the charger must also correspond to the change into a lithium battery charger dedicated to 12V.
The charger must be changed to a 12V charger for Li-ion batteries.