If you mean such as the VST line of chargers, a cynic might suggest, and I believe, that they were smarter than Apple's PBs at managing batteries. It is even conceivable that Apple's M3050 external charger was also. Success depends as much on the wattage and condition of the AC adapter as it does on the charger. Keep tomlee59's caveat about overcharge in mind, and go for it.

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