The most indispensable accessory for your Sierra Wireless is the battery. Unless you are need of a paper weight even the most advanced device is useless without power. Use this original Sierra Wireless W-5 Battery as a replacement or spare to extend the usage of your device. Keep your Sierra Wireless device working at optimum performance levels at all times. Just pop the Sierra Wireless W-5 Battery in your pocket or bag and you’re good to go that extra mile, accessing internet wherever you please.