Lithium Ion Battery Troubles

So.....Being the thrifty, adventurous Jack (A$$ ) that I am, & researching as best as I could under said description , I Decided to forge ahead & try to remedy this .
The Story :

I recently bought a backpack Leaf blower. Upon arrival , the 80V battery showed no lights & would not start the machine . The charger would light up green , turn on it's fan , & after 30 seconds or so it would quit & would start flashing red. The MFG said it was a bad battery & sent me a replacement ( That was Nice of them ).
The replacement showed one light, ( Getting Better ), but in the charger it did the same thing ?????
MFG. then took 5 days to get back to me to state that because I bought this from an "UN- certified vendor " , they would not warranty it any longer. I Immediately went to PayPal for ongoing Litigation , but that's another story , for perhaps another time
I researched & studied other's limited available problems with this & Decided to purchase this Power supply , for $99 :
What I had learned is these batteries have a BMS, that can tell the charger not to charge, when asleep. Slow charging with an external Power supply can often wake them up ? ....... Lo & behold, It worked on both batteries ; got 2 lights showing on both & they each power the Blower now . ( )

Alas , neither will charge on the OEM charger , as it does the same thing as mentioned above with both .
( )

As I'm more of a Tradesman / Mechanic type vs an Electrical Enginneer, I would appreciate any knowledge that Y'all could offer.

I can buy a New replacement charger for $ 40 , most likely from another "UN- certified vendor ",
'Cuz their certified vendors want $ 100 - $ 150 for one , & try my lousy luck , ( ) ...... or I can just continue to use my new Power Source. I am going to try waking up some other 20V batteries latter today.

What has any one else done with these & what do Y'all suggest I do ????????

 

Thanks Howard.
Yes Sir , I made myself aware of these settings and I did use them while charging . Watched closely for any heat build up , too.
The BMS does have a too hot temp sensor, but mine did not operate at all & were@ room temperature when I attempted to charge them on the Factory charger.
The factory charger is only to charge 80v Batteries , from 2 amps up to 4 amps . My batteries are 80V _ 2 amp & 2.5 amp.

 

What has any one else done with these & what do Y'all suggest I do ????????

I've posted here before about my experience of cheap Li-Ion batteries and defective chargers.

In brief, a tool battery exploded without warning and came within seconds of burning down a building I'd been restoring for several years. It made a super-effective firebomb beyond anything I could have imagined. I'm not joking. My knees go weak when I think I used to leave them
'on charge' in my own home.

I would STRONGLY advise not screwing with Li-Ion batteries or chargers, and most especially not using discount brands.

 

Thank you for your tutelage ( ) Howard . KISS principal usually applies, Eh?
Take a look at the bottom of the board , just north of that heat sink board, if you may. Obviously , this Brand New unit was in water ( ) . I'll clean all of this ' debris ' out & see what I can do about soldering this.
I'll Report back later .

 

Correct Sir. Just discovered that & came to same conclusion . I'll buy the other one under a 3 year warranty.
Thanks for your support on this , Howard......I've missed the All Star game , to Boot