Hammer-fm wrote:Agree with this one. Old batteries with a failed cell will often show 12+V after charging, but the instant you put a load on it they'll go to <8V (near-zero if they're in really bad shape). If you have a dummy/load resistor around that's an easy way to check (or an automotive 12V lamp, etc.).
Hi. I apologize in advance if I’m “hijacking” the OP question. I have a similar complaint for a Power Wheel I just purchased second hand. Battery tests good on dmm but once in use it almost immediatly goes to a slow crawl & stops.
I didn’t see where I can create my own post. I reviewed the FAQs & new member posts that I came across.
I am new to all that is Power Wheels & no knowledge of electrical. I have searched this forum & also the archived “http://www.modifiedpowerwheels.com”.
If I posted incorrectly, please direct me to correct process.
I have a Power Wheels 12v gray battery model 00801-0638. Stamp code: 1772PM2. Based on other posts I don’t see how to determine the date based on that code.
I have a Power Wheels probe style charger model 00801-1778.
I borrowed a DMM & checked the battery while disconnected. It reads 13.20v.
I wanted to test the charger so I plugged into outlet & it reads 14.16v.
I plugged the charger into outlet & battery, dmm reads 14.14v on the battery terminals with charger connected.
I don’t have any dummy load equipment. I gathered from other posts that I should elevate the Power Wheel so the tires spin & check the battery “under load”. This is where I’m stuck.
When I propped the Power Wheel on bricks so that the wheels with the box can spins freely, & the battery is installed & connected to plug, there are no available prongs to use the dmm on. The plug inside the Power Wheel covers all the +\- terminals.