have a device that comes factory with a sealed AGM battery and a wall wart for a charger. My dad gave me the device because it was not charging. I determined the transformer for the charger was toast so I just grabbed another. Factory spec was 800ma. I only had a 500ma.
The charger was the same 15VDC output and I verified that. However, there is a small series device on the chord that I determined was more than just an LED, it seemed to be a current limiter or additional voltage reg that brought the voltage in at a nice trickle of 13V so I just left it plugged in for later checking. Came back to another toasted charger. Transformer was hot and no output.
I checked the current to the battery at only 200ma which I found odd considering the battery was nearly dead and the charger prob should have been taxed but I left it.
Curious what is going on here? Do these little wall warts current limit at all? The switchers maybe? I have one and plugged it into the battery and was charging at 1.5A and rated at 1.0A so I unplugged until I know more. I suspect that little LED device might have toasted the charger transformer?
The charger was the same 15VDC output and I verified that. However, there is a small series device on the chord that I determined was more than just an LED, it seemed to be a current limiter or additional voltage reg that brought the voltage in at a nice trickle of 13V so I just left it plugged in for later checking. Came back to another toasted charger. Transformer was hot and no output.
I checked the current to the battery at only 200ma which I found odd considering the battery was nearly dead and the charger prob should have been taxed but I left it.
Curious what is going on here? Do these little wall warts current limit at all? The switchers maybe? I have one and plugged it into the battery and was charging at 1.5A and rated at 1.0A so I unplugged until I know more. I suspect that little LED device might have toasted the charger transformer?