Keeppower AAA USB 667 mAh rechargeable battery

The Keeppower AAA USB 667 mAh rechargeable battery (P1044U1) serves as a replacement for the classic AAA batteries. Inside is a Li-ion cell that features regulating electronics that maintain a solid 1.5 V output voltage during discharge. The battery is therefore particularly suitable for devices that are sensitive to voltage levels and, for example, do not work properly with rechargeable NiMHs or only for a short period of time. The capacity of the battery is 667 mAh (1.0 Wh which corresponds to a capacity of 833 mAh for NiMH).

The battery is charged only via the built-in micro-USB connector, so it can be charged e.g. from a computer, mobile phone charger, power bank or other USB source. It cannot be charged in a conventional charger.

Tip: to charge multiple batteries at once, you may want to buy a four channel micro-USB charging cable.

The battery also has built-in protection against complete discharge and short circuit (maximum continuous discharge current is about 1.5 A). The battery is therefore suitable for example for navigation, weather stations, laboratory instruments and other devices. The battery is also compatible with Fenix HL15 headlamps and flashlights, Fenix HL16, Fenix E01, Fenix LD02, Fenix LD05, Fenix HL18R-T, Fenix HL32R-T.

When using this battery, it is important to note that you cannot tell the remaining capacity by the output voltage. Thus, the instruments may indicate full battery capacity throughout the operation, but then the batteries will suddenly shut down. When the battery is discharged, its voltage suddenly drops from 1.5 V to 0 V.

Battery parameters

Nominal voltage: 1.5 V (the battery keeps it constant until discharged)
Capacity: 667 mAh / 1.0 Wh (min. 600 mAh)
Maximum current draw: 1.5 A (higher current will cause short circuit protection to intervene)
Charging via built-in micro-USB input. Charging current: 120 mA.
Charging time for a fully discharged battery is about 2 hours.
Protective electronics built-in at the plus pole provide protection against overcharging, complete discharge and short circuit.
Lifetime of over 300 charge cycles
Diameter: 10.35 mm (+/- 0.2 mm)
Length: 44.9 mm (+/- 0.5 mm)
Weight: 8 grams.

Charging via micro-USB connector

Plug the USB cable into the side micro-USB connector, the indicator light on the top of the battery glows red during charging. When the battery reaches full charge, it glows blue.

Warning

Cannot be charged in conventional chargers
Do not short-circuit the battery (do not connect the cell poles with a wire)
Do not throw the battery into fire or water
When using the battery, observe safety guidelines

Warranty

Legal two-year warranty.