I purchased a Valence N-Charge Battery at Best Buy. They advertise 5 hours but I only got 1 hour from it on my IBM Thinkpad. When I called Valence Tech Support they told me that this was normal so I just returned it for a full refund. Then I found out about this other company called BatteryGeek (www.batterygeek.net) and for about the same price as the N Charge ended up buying thier BG 14-18-118 model Ultra High Capacity External Laptop Battery. Now I am getting anywhere between 6-8 hours of power per charge depending on the application(s) I am running. The footprint of this BatteryGeek battery is much smaller than the N Charge. Also, I prefer this BatteryGeek battery for travel because the connecting cable is long enough so I can keep the battery in my travel bag on the floor while I have it plugged into my laptop which is either sitting on a table or my lap.
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I purchased a Valence N-Charge Battery at Best Buy. They advertise 5 hours but I only got 1 hour from it on my IBM Thinkpad. When I called Valence Tech Support they told me that this was normal so I just returned it for a full refund. Then I found out about this other company called BatteryGeek (www.batterygeek.net) and for about the same price as the N Charge ended up buying thier BG 14-18-118 model Ultra High Capacity External Laptop Battery. Now I am getting anywhere between 6-8 hours of power per charge depending on the application(s) I am running. The footprint of this BatteryGeek battery is much smaller than the N Charge. Also, I prefer this BatteryGeek battery for travel because the connecting cable is long enough so I can keep the battery in my travel bag on the floor while I have it plugged into my laptop which is either sitting on a table or my lap.