56V POWER+ 4 Ah ARC Lithium-Ion Battery

Long lasting in my use to date. Light meter to advise capacity left as you sue the battery. Rather heavy so made the blower and the trimmer a bit unbalanced with the concentrated wait on one end. Neck strap solved that issue for the trimmer. Some may prefer the smaller and thus lighter battery but that may require you have a spare.

I have 3 of the 4 hour batteries. 2 work just fine and seem to last a long time. One is used on a leaf blower another is used for a line trimmer. Third one is on the new hedge trimmer. This one is problematic. It will function as designed for awhile then, even after charging will show a red circle or one red bar that flashes. When this happens, after being installed in a tool will only run a second or two and flash red. Wait a bit, repeat till I give up. Right now it is functioning correctly and showing 3 green bars. Hence a 4 star rating. Only time will tell if the 3rd battery is worth keeping.

I purchased this 4.0 AMP battery as my original 7.5 AMP is no longer holding sufficient charge to entirely mow my lawn. Replacing the 7.5 AMP with a new one would have been the price of purchasing a new EGO lawn mower with a 5.0 AMP battery. Granted the replacement mower would not have been self propelled which I do not use anyway. I was informed by EGO that discounted batteries are usually part of a new tool purchase. EGO should also provide discounted batteries for homeowners that have registered their EGO tool.

I've been pleasantly surprised with this 10A replacement battery for my Ego mower. I previously used a 7.5A Ego battery that came with the mower, and this one gives me noticably longer mowing time. Even though a 10 amp should provide longer mowing time than a 7.5 amp, because this is a non OEM battery I would have been happy with equivalent run time. It charges very quickly on the same Ego charger. Will it last as long as an original Ego battery? Way too early to tell at only 10 cycles used, but at roughly 20% of the cost it's a gamble I'm very comfortable taking. My only complaint and the reason I don't give five stars is that it's incredibly hard to tell how much battery is left while using the mower. It's difficult to tell how many of the indicator lights are still green without stopping the mower and opening the battery cover. With my original battery the lights were bigger, brighter, and easy to view through the battery cover. I would still still purchase this battery again and strongly recommend it.

Bought this product because my old gas powered weed eater was heavy and finally broke. This battery works great with my new EGO electric weed eater, is light, easy to load, easy to charge, and had excellent ratings. I am happy with the purchase. Hopefully, it is a durable as advertised.

Authentic EGO battery, it appears EGO has discontinued the 4AH battery which retailed for $279, now being clearanced by 3rd party sellers for $144 here. It's the EGO battery, runs like a charm. To purchase a new 5AH battery is $329. I like to use the 4AH for the string trimmer and the blower, it's lighter than the 5AH and not a whole lot less power.

The battery came as a package promotion online. We already had the EGO 21" Self-Propelled Mower and was what convinced me to purchase these accessory lawn tools.

This review gets a three because it's predecessor battery lasted only five years. Of course at that time it's out of warranty in your forced to either buy a new battery at exorbitant prices or just buy a whole new blower that comes with a battery. Overall, the previous blower and battery worked great until the battery died. I probably use the blower at least 4-5 times a week for yard, garage, shop, and other purposes. If the battery had lasted 7-8 years as suggested I would give the products five stars.

Hard to write an interesting review of a battery. Like all EGO batteries, it charges fast, has a nice display of power left, and is expensive. It's very convenient that all their batteries operate all their devices, with a huge range of Amp Hours to choose from. Wish something on the battery told us how many times the batteries were in a charger. I've been led to believe that's what determines how long they're good for. Also wish EGO would buy or accept them back for recycling.

The original 4.0 amp-hour battery that came with the tool failed after two years of use. The battery would not take a charge. The battery was quickly replaced, and the replacement battery has been performing well. I have a number of EGO tools and am very happy with their efficiency and performance for the most part. The batteries on all of these tools last through each use without having to recharge. This makes them a great purchase and I would purchase again. I do have one issue I need your help with though. The bottom of the auto line feeder head on my string trimmer is wearing through. Is there a replacement part I can order for this?