High-quality cell with long service life and high cycle stability. Three Samsung 18650 - 35E Li-ion cells welded in series. 

Keeppower 3S1P 18650 10,8V 3500mAh Li-Ion batterypack PCB/BMS protected with cable connection.

Protection circuit BMS from Seiko (Made in Japan). Seiko Protection/PCB with short circuit, overcharge and deep discharge protection.

Safety notice:

Please note that removing or damaging the protective electronics (PCB) may cause a short circuit, fire or explosion.

Further characteristics:

Lithium-ion batteries are thermally stable and are not subject to memory effect. They work on the basis of lithium and are characterised by a high energy density.

Note:

A special charger is required for charging lithium ion batteries, which charges the batteries according to a special charging procedure. (CCCV = constant current, constant voltage.) The batteries must not be charged above the specified voltage otherwise there is a risk of fire and explosion. It is advantageous to charge the batteries below (approx. 5%) the specified voltage as this significantly increases the service life or the number of charging cycles (possibly up to double). Only lithium ion chargers may be used for charging. However, the cheap chargers sometimes have the disadvantage that they do not switch off safely at the end of the charging process, but continue to charge the batteries with a small charging current, which can be dangerous.

Furthermore, rechargeable batteries and batteries do not belong in household waste! Please dispose of them as prescribed by law at the municipal collection points or in the [usually green] containers provided by retailers.