If you use external power you do not need batteries in the Portable Powerflarm.

If you do use batteries please read the following.

Rechargeable internal Batteries
The device features an internal NiMH battery charger only active when the device is turned off. When the device is turned off and electrically connected to the vehicle or aircraft battery (either via “Power” socket or power pins on the RJ45 socket), inserted batteries will be charged if the ambient temperature lies within the allowed range for charging NiMH batteries.
If non-rechargeable batteries are fitted to the device, never connect your device to an external power source (e.g. aircraft or vehicle battery)!
The internal batteries may only be charged if the device is resting on a non-flammable, dry base. When the device is being recharged, never allow it to remain unsupervised.
The integrated charging circuit will only charge batteries at an ambient temperature of up to about 40 °C (104 °F). If possible, charge your batteries in a cool, dry environment.

This is all in the manual.


Richard
www.craggyaero.com