This charger is designed to work with our replaceable lithium (LFP) batteries. It is safe, and provides an optimal charge without making the battery overheat. There are other chargers on the market and some may have a lower price, but they may have unpredictable effects since single-cell batteries have no safety circuits built in. We only recommend using this battery charger or the basic charger without the LCD screen (and provide no guarantee or support if our batteries are charged with other chargers). Charger includes prevention for overheating, short circuit and reverse polarity. Charge current is gradually increased, reducing high-current impact on batteries. This charger is not going to destroy the battery or cause safety issues such as fire. The LCD display shows current, capacity (lifespan) and voltage in real time.
Contains independent circuits for charging 2 batteries at different levels. However, there is also a battery connector since your battery is shrink-wrapped to provide extra safety and insulation. Gently plug the battery into the connector, and then you do not have to remove the shrink-wrap. Remember to gently pull on the white plug when removing; do not pull out the battery wires. The shrink-wrap and connector help to ensure that the positive and negative wires never touch, for safety.