---
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
excerpt: "Bought the Sanyo Eneloop KBC-E1S for S$34.90 at member price from Challenger, for extra iPhone juice on trips. I weighed it against the KBC-L3S; the E1S uses two AA batteries while the L3S has a built-in lithium-ion cell."
categories:
  - "Battery & Power"
tags:
  - battery
  - Eneloop
  - Mobile Booster
  - power bank
  - rechargeable
  - Sanyo
---

Bought the Sanyo Eneloop Mobile Booster 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)](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/box_front.jpg "Packaging Front")

[![Packaging Back](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/box_back.jpg)](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/box_back.jpg "Packaging Back")

[![Packaging Contents](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/contents.jpg)](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/contents.jpg "Packaging Contents")

[![2 Eneloop Rechargeable Batteries Included](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/open.jpg)](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/open.jpg "2 Eneloop Rechargeable Batteries Included")

[![Back Of The Mobile Booster](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/back.jpg)](https://files.lesterchan.net/photos/sanyo/mobile_booster_kbc_e1s/back.jpg "Back Of The Mobile Booster")

**\*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 [http://arstechnica.com/apple/news/2009/01/icharging-on-the-go-with-the-sanyo-kbc-e1.ars](https://arstechnica.com/gadgets/2009/01/icharging-on-the-go-with-the-sanyo-kbc-e1/)