Standard Basic 48v Dolphin / Bottle battery charger
Standard 5.5mm plug fits most bottle, dolphin and shark battery cases
2 or 3amps (Support note: due to supply changes 2A version may be substituted if 3A is unavailable)
For all 48 volt lithium batteries, charges to 54 volts
Smart charger automatically shuts off when max voltage is reached
This charger takes 110-240V AC input, can be used with both USA and international outlets
Luna Cycles is offering this Chinese charger at a very reasonable $35 price. This is a standard charger that will work with most 48v dolphin and bottle packs with a barrel plug. The plug can be swapped out to be used with any 48v battery pack that needs a charger.
3 amps is a reasonable charge power for most battery packs, and charging at this level will make sure you get a long life expectancy out of your pack (the slower you charge the better for your pack).