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! Motorola SPN5504/SKN5004A micro-USB Home and Travel Charger
I bought three of these as I need one every place I go. This item is identical to the one that came with my Droid X, down to the part number and labels. I'm very happy with it. Now if I could only find a battery that lasts more than 1 hour, all would be perfect. Cost was 1/5 th of retail.
I ordered this for my HTC Evo 4G because I like to have one for the office and one for home and the EVO 4g will consume a lot of battery if you like to have WIFI or GPS enabled for extended periods of time. The price was right and the free shipping was very fast (ordered Fri, arrived Mon). This works just like the OEM charger that came in the box. I have ordered other chargers for other phones at online auction sites, and they were more expensive, not a name brand, made cheaply, and didn't last. This is a quality product that does the job at a good price, what more can you ask?
This is the same charger/USB interface cable you get when you purchase a droid. Weather you need to replace the one that came with your droid or you want an extra charger, you can't beat the price. I'm pretty sure you'll pay about 10x the price if you were to purchase one at a store. I wish I could find more items at 90% off!'
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