Sevenhills1952
Well-known member
We all have projects that turn out fine...but what about the failure ones? Especially ones that make no sense.
I have mostly DeWalt 20v cordless tools but do have a Greenworks G Max 40v chainsaw and leaf blower. One battery pack was giving problems so I decided to take it apart (security torx screws, 3 labels).
Inside are 10 unmarked batteries and circuit board. Two batteries corroded, so after figuring size (18650, 3.7v li ion) I replaced the two. Now it charged, measured 42v, all LEDs lit showing full charge. It barely worked[emoji21].
So I order, replacing all 10 batteries. I took pictures, made drawings plus I had good battery for comparison. After hours soldering in all batteries and all the wires, it took a charge! New batteries came recharged measuring about 3.95v each.
Now this pack barely runs either motor[emoji34].
What weird is good pack measures 42v...same as this one. Under load about 41v...same as this one.
Anyone else have waste of time and money projects, especially ones that should have worked?


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I have mostly DeWalt 20v cordless tools but do have a Greenworks G Max 40v chainsaw and leaf blower. One battery pack was giving problems so I decided to take it apart (security torx screws, 3 labels).
Inside are 10 unmarked batteries and circuit board. Two batteries corroded, so after figuring size (18650, 3.7v li ion) I replaced the two. Now it charged, measured 42v, all LEDs lit showing full charge. It barely worked[emoji21].
So I order, replacing all 10 batteries. I took pictures, made drawings plus I had good battery for comparison. After hours soldering in all batteries and all the wires, it took a charge! New batteries came recharged measuring about 3.95v each.
Now this pack barely runs either motor[emoji34].
What weird is good pack measures 42v...same as this one. Under load about 41v...same as this one.
Anyone else have waste of time and money projects, especially ones that should have worked?



Sent from my SM-S320VL using Tapatalk



Especially being that it 'should have worked' out so much better! 

