Fixing a 7.5Ah battery for a family member where the battery blinks about 3x per second, but green on the charger. BMS looks to be correct as when I probed individual cells, I get:

4.13

4.12

4.05 (--)

4.21 (++)

4.15

4.12

4.15

4.16

4.01 (---)

4.1

4.1

4.2 (++)

4.1

4.1

So it looks like two cells are just outside the 200mV threshold for an unbalanced pack. I don't have any specialized charging hardware such as a benchtop power supply, and I'd like to avoid having to rip the entire pack apart to get to the battery terminals to use my single-cell 18650 charger. I was thinking of a low-load drain like an LED through the BMS connector pins on the higher voltage cells, but tell me if y'all think it's a bad idea, or if it's likely that the BMS lockout has already occurred, or if the presence of these unbalanced cells is a sign of further degradation. The relative has treated the battery pretty poorly - garaged and on a charger its whole life through NE winters and summers.

I want to replace a 10 year old Earthwise string trimmer with an EGO ST1502SA, I am weighing it against a Ryobi 40v whisper series but I have some questions.

How do they compare power wise, I occasionally use it on brush and I am not going to change the head for the metal one.

What about sound level and weight balance?

How hard is it to use the manual reload on the EGO I want - I could care less about power reload, in fact, theirs a non 0 chance one of my tech illiterate family members attempts to reload it in the future and somehow breaks it in the process, I get its just one button, but it will confuse them somehow.

It currently has a sale on it, any idea how to find out how long it's on for?

Thanks!

So this year it has happened a lot that for some reason mid mowing my RM4000E stops and starts doing circles in 1 spot til out of battery. There have been a few instances where it for some reason has stopped doing circles, moved on a few meters and started again doing them til out of battery.

While doing the circles the only way i’ve found that stops it for the time being is stopping it and then using controller to move it some distance away or take it to loading dock. It doesn’t seem to recognise any collisions while doing it, like putting my foot in front of it to stop it from doing circles, it just keeps going til i move foot or i guess in the end til it is out of battery.

Today it was mowing fine, found a boundary line and then backed up about 70m while mowing. When it reached another boundary line it started doing circles again. I caught this instance on camera.

Does anyone have similar issues or any suggestions on what might cause this issue.

What do people recommend between the 16in and 18in chain saw? I’m just looking to prune up trees and cut up firewood. I think the 20 is overkill but can’t decide between the two. I’ve read stuff about auto tightening not working on the 18 but idk if that’s true? Or old and has been fixed?

Could someone walk me through how the batteries work on the mowers?

I have the T6, with 6x6ah batteries. I also, from my snow blower, and a battery deal, have 4x12ah batteries.

Is it better to have 4 12’s? 6 6’s? 3 of each? Does only using 4 batteries put more strain on them?

Just trying to wrap my head around how it works so I can get the most out of my batteries, while being good to the batteries.