--- title: Sanyo Eneloop Mobile Booster KBC-E1S date: 2009-09-21 14:35:00 permalink: https://lesterchan.net/blog/2009/09/21/sanyo-eneloop-mobile-booster-kbc-e1s/ author: Lester Chan categories: - "Battery & Power" tags: - battery - Eneloop - Mobile Booster - power bank - rechargeable - Sanyo --- Bought the [Sanyo Eneloop Mobile Booster](http://www.eneloop.info/products/mobile-boosters/the-three-versions.html) KBC-E1S for S$34.90 (member price) from Challenger. Need the extra battery juice for my iPhone 3GS when I am in Taiwan and Hong Kong! I was deciding between the KBC-E1S and the KBC-L3S. The KBC-E1S uses 2x AA batteries while the KBC-L3S uses the built-in lithium-ion battery. I was thinking that AA batteries are more readily available outside and hence I am able to buy any AA batteries and use it to charge my phone. Also the KBC-E1S includes 2 rechargeable eneloop batteries. ![Packaging Front](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/box_front.jpg) ![Packaging Back](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/box_back.jpg) ![Packaging Contents](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/contents.jpg) ![2 Eneloop Rechargeable Batteries Included](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/open.jpg) ![Back Of The Mobile Booster](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/back.jpg) **\*Update\*** My iPhone 3GS is on 25% battery and I started charging at 00:00 (midnight) exactly. The Mobile Booster KBC-E1S was drained completely at 1.20am and my iPhone 3GS was charged till 71%. So that makes it 80 minutes to charge 46%. **\*Update 2\*** More detailed review over at