I’ve been tracking how much power it takes to charge my Ego batteries since I purchased them. I’m using this as a stand in for how much capacity they retain over time. You should know that I have a large lawn (in Florida) and cycle these batteries at least once a week (more in the summer) so these batteries are getting more of a workout than if you had a small city lot that you could mow a few times before charging the battery.
I have two 7.5 AH batteries (one bought before the other). They took 410 watt hours to recharge when new. After one year of usage, the remaining capacity was (78% 320 w/h and 82% 340 w/h) on the two batteries. My older battery has two years of use, and has 70% of it’s original capacity (290 w/h). So it looks like they drop between 18 and 22% of their capacity the first year, and an additional 8% the 2nd year for a total loss of 30% of their capacity after the 2nd year of usage. [The batteries have a 3 year warranty.]
Update: See my new post at the 3 year mark for the 2014 battery (and 2 year mark for the 2018 battery).
Hi,
Thanks for the info. Batteries are rated in cycles. What you should do is keep a record of how many times each battery is charged and what level the battery is at when you put it in the charger because the depth of charge determines the number of charges (cycles), the less discharge the more cycles..
So if I understand correctly you basically discharge the battery completely once a week with some weeks twice. OK, let’s say that’s 75 times a year roughly.
Ego says the batteries are capable of between 800 -1200 cycles to a capacity of 60% but your data shows that it’s much less to 60% capacity and I tend to agree with you as you’re not selling this stuff.
Yes, I discharge the mower batteries fully every time I use them. I may be doing 100 cycles a year, but certainly no where near 400….
This! is the information we need. Please keep this up. I agree it would also be good to know your cycle count. 200-250 cycles to reach near 70% is way off from the manufacturers life cycle. Thank you for this
My 56 volt battery is 2 months shy of 2 years.
Common use..
Always took care of but failed today.
Sorry to hear that, but assuming you purchased it new from an Ego Authorized Reseller and have your receipt or have already registered it with Ego, they should replace it under their 3 year battery warranty.
I started with one battery that came with my mower and than another 2 that came with the snow blower. All are showing signs of degradation. I could originally mow my entire yard on a single charge. The original battery now dies before I’m half finished. The new 2 will go about 3/4 of the way. The real disappointment is snow blowing. I have a short driveway. Maybe 2.5 cars long and 2 cars wide. It was great that first winter. Now anything over a dusting and they’ll fail before I’m finished.
They do degrade over time, but most of my 7.5ah batteries have retained at least half of their original capacity. I treat them as a consumable item and buy a new 7.5ah battery (new to me, typically with a used lawnmower) every year.
I have 5 batteries. They are all numbered so I rotate them into use. I use their string trimmer and blower. It takes all 6 batteries to do my front and back lawn. I’m 75 and been mowing lawns since I was 12. My front and back yards are not that big using these 2 tools.
I did have the head on my 1st string trimmer catch fire. EGO did replace it no questions asked. The one they sent back was a much better model.
The real problem I have is with their batteries. I have 1-2016, 2-2017, 2-2018’s, and 1-2021. One of the 2017 went bad and worst is my newest 2021 just won’t charge. These batteries are all numbered and rotated. The 2021, my newest and strongest, just quit charging. Why is one of my oldest 2017 still charging fine and my newest just failed. My opinion is the quality is not as good in the newest batteries.
Any comments.
P.S. I really my EGO tools and am looking to buy their chain saw. There seems to be a bunch of used EGO tools for sale.