Ego 56v dead battery fix

If you have any ego 56 volt batteries that are dead or not taking a charge it's most probably because one or few of the 18 650 batteries inside might have undercharged. They either are going to show 0.00 volts or less than 3.0 volts, which is their minimum voltage. To charge or complete their functions their minimum charge is 3.0 and Max full charge would be at 4.2. I connected a working 56v Ego battery in parallel to the other non-working batteries to give the cells inside a jump start high enough to be able to connect to their charger.

[orleandorsey]

Good advice but it would have been more helpful if you showed us HOW you did it.

[edgar]

Don't tell us how to do it, show it!

[bobmyers]

So put your hand on something hot and makes sure it doesn't blow up with your hand on it. GOT IT.

[RogerG-trpc]

Wow this actually worked, thank you!!

For those asking how to wire it, just take regular 14/2 nmd90 electrical wire and touch the positive of the dead battery to the positive of the charged battery and do the same for the negatives. The back of the ego battery has 4 slots, just use the left and right most slots. Disregard the middle slots. Touching these contacts at the same time shocked the battery back to life.

Thanks again!

[hawkgoalie]

Had a 2.0 for 8 years, stopped working 5 years ago. Watched this video and I am standing in my garage watching it charge on the normal charger.

[RobertAdairWorkshop]

You just saved me the $250 for a new 5Ah battery. Worked fine last season, then sat on the charger for a few months and suddenly, the charger wouldn't recognize it. I thought the charger failed. Gave up and bought the smaller battery locally, the 2.5ah one. Plug the new battery into the old charger and it worked fine. So now its a battery problem. Mine had 7volts across the terminals but wouldn't charge. I gave it a jump start with the new battery and boom, it started charging. Took a full charge and range seems normal. Big thank you!

[DinoL]

Just tried this method by connecting a fully charged battery to the dead battery. Waited about 30 seconds and it worked! Thank you so much for the information.

[chrisconcannon]

Worked like a charm. Just connected + to + and - to -. Counted to 30, placed on charger... bingo. Thanks for the tip.

[colindgrant]

Good tip but use resistors as jumpers next time to slow down the charge. The batteries got hot because putting them in parallel like that dumps TONS of current into the dead battery. Possibly 20 amps or more! That will shorten its life significantly. To bring old lithium batteries back to life it’s best to charge them slowly by limiting the current. A pair of 100ohm 25w resistors would be my choice.

[BhorsleyAD]

Fixed! I did the 6 inch drop onto concrete and put the battery on the charger and amazingly it started charging. I too had the fully discharged red light on battery and it wouldn’t charge on the charger. I called ego support and it was out of warranty. Was considering the jump start thing but last ditch tried the drop and it worked. Totally stoked!

[timwilliams]

You could also just throw a 12V trickle charger on them for an hour or five to get them up from zero and then use the normal charger. I have some 20V Black & Decker batteries that were completely dead and revived by throwing a 5V charge on them for a couple hours Using an old cell phone charger. Once it has some power, the smart chargers will recognize the battery and do their thing.
Thanks for your video and the info

[alcornsugar]

Possible method to reset battery pack

I pressed and held the battery button while placing it on the fast charger, continuing to hold the battery button for several seconds after putting it on the charger. THIS WORKED!!

[shortattentionspangarage]

Good tip, thanks for making a video. It seems the trick is to NEVER let the Ego battery completely die. Always put it on the charger when there's some life left in it. The internal BMS should prevent this but who knows how well that design is.

[eltorpedo]

So...put your hand over a battery that may be about to explode? Something about this advice seems off to me.

[MP-zfkg]

This process also works for 20v batteries. The charge is pretty much instantaneous, gets the battery pack juiced enough to work on the chargers.

[Paul-pgsg]

Glad I found your video, "jump start" did the trick for me.

[talon]

Thanks so much for the idea to "jump" the battery. I got a "defective" 7.5ah battery that wouldn't charge and got it charging/working with your idea. I had to cut a few thin pieces of metal (cut up a hose clamp with tin snips) for the contacts, VERY CAREFULLY inserted them, being careful not to contact/bridge them together, used a pair of car battery jumper cables, hooked the batteries together for 30 seconds and then quickly put the "defective" battery on the charger and got it to take a charge. I tried putting it on the charger previously 20 or so times and got the red "defective" light. Defective battery was only showing about 30 volts according to my multimeter. Good battery was about 55v.

[driftx]

Yay I jumped my two 2.5ah batteries using a cut up hose clamp for 20 seconds and now it's charging.

[ucdbnxt]

Mine wasn't charging.. no fan, etc.. Read about dropping the pack on the floor... SO I hit/tapped it with a rubber mallet on all sides several times and it is now charging away.
Guessing the battery contacts somehow get a buildup and lose contact....

[scrogus]

I just kept plugging and unplugging the battery from the charger, the trickle charge from doing that like 15 times was enough for it to actually kick on the charger.