What is the life expectancy of the 7.5ah battery?

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  • Updated 3 years ago
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What is the number of times the 7.5ah battery can be recharged?
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Peter Benedetto

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Posted 3 years ago

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Blue Angel, Champion

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Ego uses high performance Samsung 25R cells. At their full discharge rating of 20A they are rated to exceed 250 cycles at 60% capacity. But I need to emphasize that 20A rating; the 1000W motor in the SP mower will draw roughly 20A from the entire battery pack, and since the 7.5Ah battery shares that load between 3 parallel strings of cells, each cell will see 1/3 of the load, or roughly 6.7A.

Suffice to say the 25R cells in the 7.5Ah battery will FAR outlast their 250 cycle rating. But even at 250 cycles, that's equivalent to someone mowing their lawn every week for 5 years, and only if the cells are fully charged to 100% capacity at the start and drained to 0% capacity at the end. Since Ego's battery management is somewhat conservative, even depleting the battery is not equivalent to a full cycle.

Long story short, as long as the battery pack doesn't suffer any unforeseen issues, it should last the average person somewhere between 5-10 years.

Here's a very detailed report on the Samsung 25R cells if you want to read it:

https://batterybro.com/blogs/18650-wh...
(Edited)
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Dave .

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Wow, such anger!   You will prolly be happier if you call EGO and ask them your question directly, as we are "morons" here.
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Jennifer VandeWater, Community Manager

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Official Response
You may know that battery life is usually measured in terms of recharge cycles. It is nearly impossible to predict the number of cycles your battery will produce because of varying environmental conditions. We do have a 3 (three) year warranty on all batteries and chargers, so you can feel confident knowing your battery will be protected in the unlikely event that it doesn’t function properly in those first three years of ownership.

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