Cheyanntx - Yes. The mega or XL 510 battery is an inch longer than standard 510 battery but no bigger around so it makes no difference screwing it into the multi-charger. Just takes a little bit longer to charge. I have eight batteries charged right now (green lights) and six already charged in the non-charge storage row. The 10-charger has 10 holes for charging and a non-charging 10-hole storage row behind that to keep batteries or attys.
Absolutely love it.
Absolutely love it.
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