Keeppower 1.5 V Li-Ion battery – provides a constantly high operating voltage and is ideal for powerful devices with a battery change indicator. Thanks to the constant voltage at 1.5 V, the battery remains stable for 70 % of the runtime; only then does it slowly drop linearly from 1.5 V to 1.1 V. This means that devices receive a low battery warning in good time – for maximum safety and reliability in continuous use.
Thanks to the integrated USB-C connection, the Keeppower 1.5V battery can be charged flexibly at any USB source such as a power bank, laptop or mains adapter – ideal for travelling. In addition, the battery can also be charged in compatible chargers for 1.5V Li-ion batteries – for maximum versatility and convenience when charging.
Constant 1.5 V output voltage – ideal for devices that are optimised for disposable batteries
Linear discharge curve – voltage remains stable over 70 % of the runtime
USB-C charging port – flexible charging via mains adapter, power bank, laptop or smartphone
High capacity – 3750 mWh (approx. 2500 mAh) for longer runtimes
Up to 1000 charging cycles – sustainable and cost-saving
Compatible with battery replacement indicators – devices receive a timely warning when the voltage drops
No memory effect – can be recharged at any time without loss of capacity
Thermally stable & leak-proof – reliable and safe for everyday use
Ideal for smart homes, wildlife cameras, toys, photographic equipment, modelling
Important: The Keeppower 1.5V Li-ion batteries can be charged via the integrated USB-C socket or with the following chargers: “Chargers for 1.5V batteries. “ Charging with a conventional charger for NiMH/NiCd or 3.6V – 3.8V Li-ion batteries is not permitted, unlessincompatibility with the variant or voltage behaviour (volts) is indicated in the description.
Chargers for Li-ion 1.5V batteries other than the linked models are not necessarily compatible. Charging via USB is possible with any USB 5V connection (smartphone, mains adapter, power bank, laptop, etc.), so you remain flexible and always have a charging option to hand.
As many devices do not have their own deep discharge protection function, conventional rechargeable batteries can be permanently damaged by excessive discharge. The Keeppower Li-ion battery with USB-C protects itself automatically and thus ensures a particularly long service life – up to over 1000 charging cycles are possible under real conditions.
Disadvantages: The electronic control only allows the discharge current specified in the technical data. The batteries can only be charged via USB-C or a suitable charger.
Please note: Electric motors, e.g. in toy cars, require several times more current than the specified continuous load when starting up.
https://www.pocketnavigation.de (very detailed information and comparative tests on the 1.5V batteries)
Review: Kepppower P1450U2 and P1450TC (very detailed type-related comparisons with discharge curves)
Higher performance for motorised devices – e.g. toys run faster, fairy lights shine brighter
Electronically regulated voltage – full power until shortly before discharge
Stable output voltage without voltage drop – reliable even with intensive use
Suitable for travelling – can be charged directly via USB-C, no charger required
High energy density – lots of energy in a small space
No memory effect – lithium-ion batteries are thermally stable
Standard size AA (Mignon) – replaces 1.5 V batteries in almost all applications
1x 1.5V Li-ion rechargeable battery P1450TC
When ordered in pairs (2 pieces), a USB cable with two USB-C plugs and a battery box are included.
Technical Data
| Model | Keeppower P1450TC |
| Type / Size | AA (Mignon) 1.5V Li-Ion, USB-C |
| Capacity (nom.) | 2500 mAh |
| Energy content | 3750 mWh |
| Nominal voltage | 1,5 V |
| Max. Discharge current | 2,5 A |
| Charging connection | USB-C (5 V / 0.45 A) |
| Charging time* | ≈ 3 h at 430 mA |
| Dimensions | Ø 14.5 × 50.4 mm |
| Weight | ≤ 20 g |
| Battery type | 1.5 V AA Li-Ion battery (USB-C PCM) |
| Model number | P1450TC |
| Nominal capacity | 2500 mAh (min. 2400 mAh @ 0.2 C) |
| Standard charging current | 450 mA (USB-C) |
| Max. charging current | 450 mA |
| USB input voltage | 5,0 ± 0,5 V |
| LED indicator | Red = charging, blue = full |
| Charge limit voltage | 5.0 V (internally regulated) |
| Charge-Upper Voltage | 5,5 V |
| Final charging current USB full | < 50 mA (blue LED) |
| Standard discharge current | 200 mA |
| Max. Continuous load | 2 A |
| Final discharge voltage | 0 V (electronically regulated) |
| Dimensions (max.) | Ø 14.5 × 50.4 mm |
| Weight (max.) | 20 g |
| Temperature: Charging | 0 °C – +45 °C |
| Temperature: Discharging | -20 °C – +60 °C |
| Storage (1 month) | -20 °C – +50 °C |
| Storage (3 months) | -20 °C – +40 °C |
| Storage (1 year) | -20 °C – +25 °C |
| Protective functions | Over-/deep discharge, short circuit, overcurrent |
Source: Keeppower data sheet DP-111250-25M001 (03 / 2025) :contentReference[oaicite:2]{index=2}
LR6 / AA rechargeable battery with an electronically regulated output voltage of 1.5 volts is revolutionising mobile power supply for many standard applications. A built-in Li-Ion battery with a nominal voltage of 3.6V to 3.7V is regulated down to 1.5V using electronics in the form of a PCB.
Mode of operation:
When using a high-quality 3.7V Li-ion battery with 1100mAh, the energy is up to 3750 mWh. After the output voltage has been reduced to a constant voltage of 1.5 V by the electronics, this corresponds to a capacity of 2500 mAh.
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