EGO Power+Battery 56V, 4.0Ah - BA2242T

Despite the fact that I have a lot of experience with LiFePo batteries I thought I'd try one of the much cheaper Chinese replacements for the 7.5 AH Ego Power battery. Here's what I learned.The original, now five-year old battery that came with my Ego lawn mower when new was beginning show its age. I was no longer able to mow both front and back yards with just one full charge. Then, the mower's battery indicator would flash red even before finishing just the (larger) backyard. That said, these batteries should last MUCH longer. Current LiFePo chemistry is good enough that we should reasonably expect at least several thousand cycles before reaching a theoretically diminished limit of 80% of original capacity. Unlike older battery chemistries LiFePo battery packs typically deliver a consistent level of energy until nearly exhausted when they suddenly fall off a cliff and the built-in Battery Management System, (BMS) shuts everything down to protect the cells from further damage. So, five years is way short of these typical expected lifetime values. I got about half of what I expected especially when using the Ego Power battery charger. I wouldn't care so much about the failure to deliver the expected performance, but these batteries are not cheap!With this in mind I didn't feel like I owed the Ego Power people my continued business. Going all-electric was supposed to save a few dollars on fuel over the typical gas-powered mower we all grew up with, right? Instead, any savings I was supposed to get by being oh-so cool and environmentally-concerned was wiped out when I only got half of what I expected from the battery.What did I do? First I bought a 6.0 AH Chinese knock-off on Amazon. It looked just like the Ego-branded battery, but slightly smaller in size and weight as expected. I incorrectly assumed that 5-6 years of improving battery technology might work to my advantage and the labeled AH difference might be a wash. Yes, a lower capacity battery module at 6.0 vs. 7.5 Ah, but MUCH cheaper to buy than the equivalent 7.5 AH Ego Power-branded offering.I tested the the 6.0 AH the best way I should: by mowing the lawn! I had to wait a while to allow the grass grow enough to try the battery out. My un-scientific verdict was that this brand new advertised 6.0 AH battery was actually closer to 4.8 - 5.0 AH. Not even close to the advertised 6.0 AH. Thankfully, Amazon was good enough to accept my return even after a few weeks had passed.I've read all the comments about having the proper combination of Ego battery and the Ego charger. But all of these batteries, including the Chinese knock-offs, are assembled with their own built-in BMS's. Fact is, LiFePo batteries could care less about being charged by a special LiFePo charger since the battery's own BMS regulates everything about the charging/discharging process internally.Ultimately, I bit the bullet and forked over for the new Ego Power-branded 7.5 AH battery knowing that while it seems to have the same amount of power I need to do the job, it will probably not last as long as it should. This is an issue which Ego Power and all its competitors need to address.All that said, the durability and overall build quality of all my Ego Power products are excellent. I look forward to trying out whatever new products they come up with.

I'm a recent purchaser of an Ego Weedeater. I've used the heck out of it since I bought it.This is a good battery that holds the charge well. I sometimes go a couple of weeks without using it or charging it and it works well.The Ego Weedeater with this extra battery is the best Weedeater this 67 year old has ever owned.

Love the whole Ego line , we have the weekender, leaf blower and edger. The battery last longer than me! We'll made product ...I would say a little heavier than some but still lighter than a gas powered one. Easy to install...great value for the money. One battery fits all. Strong power , can honestly say it outworks my stihl one

Great battery. Life of battery cuts our whole front as d some of the back. We have 2 so that we have a back up but if you have medium size yards this batter will work for you.

Ego has quite a racket going with these batteries.They are expensive, the 2.5ah doesn’t run long even on a blower, they have a lifespan of about 3-4 years and then you have to buy new ones.And when they are out of juice, they just quit with no warning. For the price Ego charges for their batteries you’d think some sort of audible sound or vibration could be produced when 10% power is left.They do charge relatively quickly when new but that doesn’t last either. With age comes “charging arthritis” and eventual replacement.This is a personal observation from empiric experience with the 2.5ah and 5ah batteries. They seem to know when the user is at the farthest point from their home to run out of juice.I use this battery on my Ego blower only and I have 2 Makita gas blowers for real work like thick wet fall leaf cleanup and other heavy duty cleanup.Overall this battery is OK but for me Ego batteries and tools are lightweight, residential tools for the non-mechanically inclined or those who dislike fossil fuel lawn tools.

These are SO expensive. But note that they come with a 3-year warranty (so keep your receipt and register it at the EGO web ste). In my experience, they last at least 3 years. So Egopower doesn't lose much by warranting them.

I have now four of these batteries, two of my weed eater and two of the leaf blower and they do hold a charge for a long time and have been working very well

Holds a good charge, great option for back-up battery or for that extra umph needed on longer jobs. NOTE: This is the SMALLER battery, not the stock one that cones with the lawnmower (still fits but it's not going to last as long).