hahale Posted July 24, 2012 Share Posted July 24, 2012 I am considering to buy a external battery/power bank for my samsung galaxy S2 because the battery died so quickly.I search the keyword--external battery/power bank at amazon,find a lot brand,but many of them are too expensive.I find a Ravpower 5600 mAh external battery and its price and review are ok,it's in my budget.They told me the conversion rate of this external battery is very high,have reached 89%,so the quality is very good and can be guaranteed,but in fact,I don't know how to judge conversion rate and don't know whether it is good if the conversion rate reached 89%.So anyone know if the 89% conversion rate is good? Quote Link to comment Share on other sites More sharing options...
gargeo Posted July 26, 2012 Share Posted July 26, 2012 I am considering to buy a external battery/power bank for my samsung galaxy S2 because the battery died so quickly.I search the keyword--external battery/power bank at amazon,find a lot brand,but many of them are too expensive.I find a Ravpower 5600 mAh external battery and its price and review are ok,it's in my budget.They told me the conversion rate of this external battery is very high,have reached 89%,so the quality is very good and can be guaranteed,but in fact,I don't know how to judge conversion rate and don't know whether it is good if the conversion rate reached 89%.So anyone know if the 89% conversion rate is good? Really?Your external battery conversion rate can reach 89%?89% conversion rate is a very high value,because many brand external battery can just reach 80% even lower than 80%,so this one is indeed great. Quote Link to comment Share on other sites More sharing options...
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