My new 'TESLA' lawnmower

[redpoint5]

My advice is to research which product line will best deliver the tools you'll use at the price point you're comfortable with, and then stick with it for battery compatibility.

I'm invested in the Ryobi brand, and they have 2 battery form factors compatible with all of their products past and present, 12v and 40v.

[aerohead]

It was a friend's Ryobi, 40-Volt mower that got me interested in an electric. They can switch the battery for the LED lamp, chainsaw, line-trimmer, and drill.
I looked at them at The Home Depot. Still 40-V.
I really liked the 80-V KOBALT.

[redpoint5]

I've been plenty satisfied with my Roybi products, especially my recent 18" chainsaw, but many of the other brands are regarded better, with Ego at the top and Greenworks a notch below.

One interesting thing to me is the Ego batteries have state change material to help absorb excess heat, and a fan to dissipate it. That must explain the extra expense.

[aerohead]

I'm continually impressed by all the clever thinking and innovation going on out in the world. People are coming up with solutions for problems I didn't even know existed! It's great. Thanks!

[redpoint5]

Interesting and informative PDF I found on the Ego power system.

https://egopowerplus.co.uk/sites/def...mpressed_0.pdf

I'll probably link this whenever someone needs to know battery/electricity basics.

[Stubby79]

Originally Posted by redpoint5

One interesting thing to me is the Ego batteries have state change material to help absorb excess heat, and a fan to dissipate it. That must explain the extra expense.

I've taken apart a number of Ego batteries. The early ones had the extra material around the cells, but later ones did not...neither had a fan inside them. They did have quite a lot more (passive) vent holes than most batteries.

Have they changed again in the past couple of years?

[teoman]

Those ego batteries do look nice. Much like the power packs in sci-fi movies. I agree with redpoint, select a brand and stick to it, personally I went with the Ryobi cult. They seem good enough for hobby use. On youtube there are some professionals who use them daily, and they seem to be happy with them, but it is youtube so no idea if it is true.

I have seen adapters that can adapt your battery from makita to ryobi to whatever.

[teoman]

3D printing the charger docks so that you can power your car's battery would also be an interesting concept.

[redpoint5]

Originally Posted by Stubby79

I've taken apart a number of Ego batteries. The early ones had the extra material around the cells, but later ones did not...neither had a fan inside them. They did have quite a lot more (passive) vent holes than most batteries.

Have they changed again in the past couple of years?

That was just what someone told me. I must have misunderstood, and the fans are only on the chargers. The Ego document says they are still using phase change material around the cells. They also design the pack with more surface area rather than packing the cells into the tightest block they can.

Don't really know how that plays out in longevity. I've got a Craftsman cordless drill about 10 years old now and the original small lithium ion battery is still going.

[2000mc]

Egos rapid charger has a fan, the slower ones don’t. If you just drained it, it will go on the charger hotter than it comes off.
My egos had some problems too, the self propelled drive seemed to be getting hot, it would lose power after using for a while. Didn’t take it in until about a month ago, got an email from ego saying they sent out a part, but not sure what part, only had a part number, and haven’t heard from the shop it’s at yet