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For those interested... The output rating of the Motorola SPN5504 Battery Charger (as of April 2011, no longer directly stocked by Motorola) is 850 MA (milliamperes) at 5.1 volts. The lithium-ion battery within the Motorola Droid 2 Global cellphone, Type BP6X, is rated at 1420 mAH (milliampere-hours, typical). So, if you were to use the cellphone, discharging it down to the 5 percent level (as indicated on the "Battery Management" screen of the cellphone), the time it would take to recharge the phone to 100 percent (fully charged state) would nominally be 95 minutes, calculated as follows: Recharge time = (Percent_discharged x Battery_capacity) / battery_charger rate, i.e., (0.95 x 1420) / 850 = 1.587 hours or 95 minutes. Similarly, charging rates for given percent battery discharges are: 90% - 90 minutes 80% - 80 minutes 70% - 70 minutes 60% - 60 minutes 50% - 50 minutes The above are "nominal" charging times. If the battery has a different capacity or the battery charger has a different rating, then the charge times will differ accordingly. If the battery charger cannot provide 850 milliamperes output (i.e., the nominal rating is less than 850 ma - as may be the case with a "cheap" battery charger), then it will lake commensurately longer for the battery to be fully charged. (For example, if the battery charger has an output of only 650 ma, the time to fully charge the 1420 mAH battery in the cellphone from a 95% discharged state would be 124 minutes - significantly longer.) I actually tested the above, using my almost new (3 weeks old) Motorola Droid 2 Global phone with the OEM Motorola battery BP6X (provided with the cellphone) and the accompanying OEM Motorola Battery Charger SPN5328B (marked output rating: 850 mAH at 5.1 volts). The cellphone was discharged to the 5% point, at which time the Battery Charger was connected to the phone. The actual charge time to reach the 100% fully charged state was 94 minutes. Hope this helps!