Extra large replacement battery (1000 mAh) for the Happy eGo electronic cigarette with safety lock feature.

When safety lock is on, it is safe to put your eGo in your pocket/purse without worry that the battery will accidentally turn on.

You can charge a single battery using the USB charger that comes with the eGo starter kit. This battery can last moderate to heavy vapers for 10+ hours!!!

*** To turn the safety lock on/off, click the button 5 times.