No, because there is a lithium battery protection board inside, and the MOS tube of the lithium battery protection board cannot be affected by the voltage after connection in series, as well as by the load voltage when connected in series. the MOS will be damaged, leading to the point where the entire battery will no longer work.
Basic functions of lithium battery protection board:
1. Main technical parameters:
1. Overload protection voltage (depending on the battery cell material used by the other party) Determined or requested by the customer)
2. Actual battery voltage for overcharging (based on the cell material used by the other party or requested by the customer)
3. Overcurrent protection voltage (see Depends on customer requirements. If customer does not need it, use company standard)
4. Tensionover-discharge protection (select the chip solution according to the solution required by the customer). )
5. Excessive discharge Restore voltage?
6. Self-consumption in normal operation
7. Self-consumption current in standby state (static operation current)
8. Short circuit protection time
9. Single cell overload voltage
10.? >