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60 volt battery in 80 volt charger?

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May 25, 2020 - 6:42:01 AM
2415 posts since 10/9/2011

Can a 60v battery safely be charged in an 80v charger?
I have an 80v Greenworks snow blower and a 60v Greenworks lawn mower. The mower came with a 4ah and a 2ah battery but only one 60v charger. It would be great to be able to charge both batteries at the same time. Externally, the 80 and 60v batteries appear identical in all dimensions and contacts.
I suspect the answer is no, but I didn't want to experiment.

May 25, 2020 - 6:56:28 AM

6913 posts since 2/14/2006
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No, it's not safe. The 60V battery will push more amps going through it when it is being charged with a 80V charger than it's rated to handle.

Edited by - Doug Knecht on 05/25/2020 07:01:36

May 25, 2020 - 9:18:02 AM

2415 posts since 10/9/2011

Do bad these companies don't have smart chargers which detect the rating of a battery, and only deliver the right amount of current.

May 25, 2020 - 10:53:26 AM

14817 posts since 12/2/2005

Originally posted by brewerpaul

Do bad these companies don't have smart chargers which detect the rating of a battery, and only deliver the right amount of current.

True that, but also bear in mind that most have different shapes, too, so that you can only use THEIR products if you need to replace one. They try to keep the aftermarket stuff unavailable. Computer companies do the same thing with batteries and power adapters.

May 25, 2020 - 11:22:15 AM



3727 posts since 6/17/2003

It also depends on the type of cells these batteries are made of.

Nickelmetalhydride are a totally different chemistry from (the now more current) Lithium Polymer cells.

Trying to charge a Lipo with a NiMh charger will most likely result in destroying the battery with lots of smoke and fire.

So unless you know what you're doing, don't 'just attempt' something.

The LiPo flight packs for my model aircraft are having an energy density that's unreal and I'm handling those with proper respect.

May 25, 2020 - 11:29:53 AM

2415 posts since 10/9/2011

Even if it had to be the same brand, a smart charger would be useful in my case.
I got this at Lowe's, and their Cobalt 60 and 80v batteries look ALMOST exactly the same except that the guide rails which guide the battery into the charger are slightly different. Some people have hacked (literally!) the battery cases and they work, but I wasn't about to void my warranty doing that.

May 25, 2020 - 12:06:22 PM



3727 posts since 6/17/2003

For minimizing operator errors, utility packs understandably are  fiited with fool proof connections.

These utility batteries probably are having an on board balancer, whereas my flight packs are fitted with separate balancer leads and -plugs.

My first pack ever I built out of single cells, back in 2006....

That way one charger can be set up to cater for a variety of packs.

But in case of DIY equipment I would advice against any experiments, unless you really know what you're doing.

May 25, 2020 - 2:52:29 PM



482 posts since 5/29/2018

Type e-bike fire into youtube if you want to see what happens when high density batteries are used or charged incorrectly. They are interesting and funny until you realize what could happen with unattended charging in your house.

Don't do it.

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