I have a Power Wheels 12-volt battery charger. Both of the diodes on the output side are damaged. The only markings I see on the diodes is: (on one line) R P I 5 0. And on the line beneath that is: D X
Could you share a photo of this part?
The two diodes attach to one lead of the output, and to two points on that side of the transformer. The other output lead attaches to one point of the output transformer. If you would like a pic of that I can post that.
I am not able to find a replacement for the ones in the included images.
I will also say that since they blew their encapsulation off, there maybe an issue with the remaining parts of the circuit that helped cause a failure. Although age and frequent use could also be a reason for the failure.
Never taken one of those apart before, but it sounds as if this “charger” is little more than a center-tapped transformer and a couple diodes, in which case the vast majority of the diodes on the market could probably restore function. Try a SF44G or something similar.
Note that such a design would represent an effort to drive production costs as far into the dirt as possible, with zero concern for overcharging/battery life; don’t forget the thing on the charger.
At the same time, ensure that batteries are charged promptly and fully after use; storing lead-acid batteries in a discharged state will severely shorten usable life. Putting one away for the winter in a state of partial charge will likely mean buying a replacement in the spring…
While I’m not in the market for such things, if I was I’d be pretty quickly splicing the plug onto a 12v battery charger/maintainer of similar rating. These are designed to prevent overcharging when connected for long periods and don’t cost much more than an OEM replacement.
And for the record, please note that the foregoing suggestions for repair/modification are offered without warranty, and that any such activity that you may choose to undertake is at your own risk.
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I have ordered a, supposedly, 12-volt 1.2 amp power supply with over-voltage protection, over-current protection, etc. Of course, for the price, if it really has all of that then I will be safer than what I was with the 30-year old original.
Thank you for trying.
I think I will try a couple of 12-volt,1.2 amp diodes and see what the output is using those. Of course, I will be taking the battery outside for charging until I feel okay with the results.