Chocolate fireguard
Active member
I have had a Bisun lamp for 12 or 14 years and have been very pleased with it.
I have not caved this year and when I charged and ran it yesterday it dimmed after only an hour, with the battery voltage right down.
The battery pack is 3 * 1.2V NIMH and the charger came with it.
I have made up a set of 4 * 1.2V NIMH of lower capacity (2800mAh).
I believe the charger and lamp will accommodate the higher voltage.
I am monitoring the charging current at 770mA, but every 5 seconds the current drops to a lower value then recovers. It seems much too regular to be a fault.
After a bit of thought I decided that this must be tied in with the charger's ability to decide when the pack is fully charged, but Google doesn't come up with anything.
Is this right, or have I done something silly?
I have not caved this year and when I charged and ran it yesterday it dimmed after only an hour, with the battery voltage right down.
The battery pack is 3 * 1.2V NIMH and the charger came with it.
I have made up a set of 4 * 1.2V NIMH of lower capacity (2800mAh).
I believe the charger and lamp will accommodate the higher voltage.
I am monitoring the charging current at 770mA, but every 5 seconds the current drops to a lower value then recovers. It seems much too regular to be a fault.
After a bit of thought I decided that this must be tied in with the charger's ability to decide when the pack is fully charged, but Google doesn't come up with anything.
Is this right, or have I done something silly?