crazycool said:I think this one is better DuracellTo each his own for different reasons and purposes I guess ... why I don't think the Duracell you linked is better than this Kensington would be because of this:

Duracel Mobile Charger:
Product Dimensions: 6 x 5 x 4 inches, 4oz + weight of 4 AA batteries

Kensington Mobile Charger:
Battery Pack Dimensions - 4.0" x 2.2" x 0.37", Weight – 3.5 oz

For certain situations size and weight can be very important. Sometimes smaller is better!

can you buy 2 of this and get $60 rebate? form says limit 2 per item purchase per address. not sure if its 2 of each of those listed products OR only 2 products from the list per address?

anyone care to clarify this?

B5Fan said:You also need to consider how much power you need. I can't find the exact rating for the Kensington but I saw somewhere that it could add about 5 hours of talk time. This would come out to approximately 1000mAH. The Duracell's are precharged NiMH batteries which are usually around 2000mAH. So the Duracell would be heavier but could provide twice the power or even more with larger NiMH batteries.

Also, the Kensington has a power adapter to recharge the battery. The Duracell has a pop-out recharging plug. So if you include the charger, the Kensginton is probably a lot heavier.
I doubt that even with the wall plug the Kensington would be anywhere near the weight of the Duracell with added weight of 2 AA not to mention 4 AA rechargeable batteries in it, but I have neither to actually weigh and compare. The wall charger looks to be like a typical plastic plug-in type of wall charger typical for USB devices, which most weigh barely next to nothing anymore. I have several USB device charger wall plugs, and all of them weigh less than a single NiMH rechargeable AA battery. Still, I can't be sure how much the plug itself weighs, but I do know that the dimensions are still much slimmer and easier to carry or store in limited spaces.

Here you go for stats:
Model K38021
Description USB Battery Pack
Chemistry Lithium-Polymer Cells (ATL 523450, 900mAh/cell = 1800mAH total)
Output Voltage DC 5V (USB Compatible)
Output Current 1000mA max.
Capacity 6.66Wh (1800mAh/3.7V)
Charging Time 3–4 hours (90% in 3 Hours is typical)
Cycle Life ≥ 300 times (Discharge capacity (300th cycle) ≥ 80% of Initial capacity)
Output Port Standard USB
Input Port 5-pin mini-USB
Dimensions 101mm W x 55mm H x 9.5mm D
Materials Plastic Chassis + Aluminum Covers