Hi, I bought four 'Ultrafire 3200mah' 18650 lithium poly batteries from a company called m-zone. They advertise through amazon uk.
My intention was to use either a single cell for picaxe projects, or two with an ldo regulator for 5volts.
I found out that they were going flat rather quicker than expected. I used a west mountain radio battery analyser, and the best one of the four
managed 300mah!
These were advertised with protection for under/over charging. However it appears they dont even have that!
They seemed a neat way of powering picaxe projects, as I tracked down some holders for them.
Now I've had to get more batteries, but this time from a uk company and not china!.
I know I should have researched these more, but being in a rush, saw them on amazon cheapish and then threw my money away.
Hopefully this will prevent others being conned into buying downright dangerous batteries.
At least the name is appropriate "ultra fire".
regards john
My intention was to use either a single cell for picaxe projects, or two with an ldo regulator for 5volts.
I found out that they were going flat rather quicker than expected. I used a west mountain radio battery analyser, and the best one of the four
managed 300mah!
These were advertised with protection for under/over charging. However it appears they dont even have that!
They seemed a neat way of powering picaxe projects, as I tracked down some holders for them.
Now I've had to get more batteries, but this time from a uk company and not china!.
I know I should have researched these more, but being in a rush, saw them on amazon cheapish and then threw my money away.
Hopefully this will prevent others being conned into buying downright dangerous batteries.
At least the name is appropriate "ultra fire".
regards john