30 minute battery charger vs various amp hour battery

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  • Updated 1 year ago
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  • (Edited)
Can the larger amp hour batteries be charged on my 30 minute charger that came with my mower, and if so, is there a limit to the amp hour size that will charge effectively on my charger?
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John

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Posted 1 year ago

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summetj

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Any EGO charger can charge any EGO battery. The "fast" charger will charge them faster than the regular charger (The "30 minute" charger actually takes closer to 1 hour to charge a 7.5 Ah battery.)
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Jacob, Champion

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Of course
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Blue Angel, Champion

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John, the larger batteries are all compatible with both chargers, they just take longer to charge than the smaller batteries do. For example the 7.5 amp hour battery takes 60 minutes to church but the 4 amp hour battery only takes 30 minutes on the Rapid Charger.
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Blue Angel, Champion

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Holy crow, a five hour old post and three people respond within one minute! :-]
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Jacob, Champion

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Great minds think alike?
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(a)Typical Engineer

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For consideration, if you have both the standard charger and the rapid charger, unless you're in a rush (e.g. to finish up a job), Lithium-Ion batteries will last the longest when charged slowly.  Yes, the rapid charger is designed to do the fast charging, but if you can positively influence the battery life by charging slowly, as well as charging when the battery is cool, then why not?
(Edited)
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summetj

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The QuickCharger charges the 7.5 AH battery with around 400 watts an hour, or 7.1 amps, which is slightly less than a 1C charge rate that won't negatively affect the lifetime of the larger batteries.

Charging a 2.0 AH battery would deliver a 3.5C rate, which might be right on the upper end of recommended charging rates (unless the charger somehow detects that it is charging a lower AH battery and scales things down).
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Blue Angel, Champion

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The Rapid Charger charges the 2Ah battery in 25 minutes:

60/25 = 2.4C
2.4x2.0 = 4.8A

The amperage is an average over the 25 minutes, peak current would be slightly higher as would the C rate.

;-)
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Blue Angel, Champion

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7.5Ah battery in 60 minutes:

60/60 = 1C
1x7.5 = 7.5A
7.5Ax50.4V = 378W (average)
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(a)Typical Engineer

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All this techno mumbo jumbo... just use the SLOW charger! IAW (in accordance with) the above technical rationale.



(Edited)