The flowlight can run on any 1.2-1.6V AAA battery, and also 3.5-4.2V li-ion cells without protection circuit (protected cells are longer and will not fit). Flowlights contain a DC-DC switching power supply to run at optimum brightness from 0.9v to 6v.
There are also rechargeable li-ion AAA 1.5V batteries with built-in USB charge port. Like this:
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These include an internal voltage regulator, and output 1.5V from their ~4V li-ion cell. They work great in flowlights and many other devices as long as you understand their limitations:
- the output is a constant 1.5V, so the device can not detect the battery charge level, they just suddenly turn off.
- the internal voltage regulation circuitry generates heat and can not handle the power required by some device, such as a headlamp on high, or flowlight on max brightness level in p3m8 “bolder” white mode without flickering and/or shutting down.
**We do not yet have good data on the durability of these cells. If you try them out, please let us know how it goes!
Using NiMH AAA batteries with your flowlights - If you need batteries for your lights, we offer NiMH AAA batteries which are optimized for usage in flowlights. You can purchase NiMH AAA batteries directly from our website by clicking here.
You are also welcome to use alkaline batteries - though they are not rechargeable - or other high quality rechargeable NiMHs like eneloops.
If you have any questions, please feel free to contact us!