That was what I was wondering about. I believe this one will work:
http://www.batterymart.com/p-cliplight-12v-6a-gel-battery-charger.html
Product Description:
Good for any Gel battery above 20 amp hours
Comes with a 6' AC power cord and 6' DC cord with alligator clips
12 VOLT / 6 AMP: Microprocessor based charger for applications from charging to maintenance for small to large batteries commonly used in; On-board and Off-board applications, specially designed for electric scooter, power wheel-chairs and patient lifts among others.
GENERAL SPECIFICATIONSOUTPUT: 12 volts nominal / 6 Amps N.B. Voltage Levels and charge algorithms may be preset to Customer Requirements
INPUT: Universal / IEC plug 90-245Vac, 50-60Hz
MECHANICAL SPECIFICATIONS
DIMENSIONS: 4.25" wide x 1.75" high x 6" deep 10.63cm x 4.38cm x 15cm deep
WEIGHT: 3lbs; 1.36kg
FEATURES FULL 3 LED DISPLAY: 1st L.E.D. indicates power on, 2nd indicates battery charging, 3rd indicates battery is fully charged and charger is in float/maintenance mode.
CONSTANT CURRENT STAGE: Charges at Constant Current until the bulk charge is done and then switches to the Constant Voltage Stage.
CONSTANT VOLTAGE STAGE: Charges at Constant Voltage until the battery system is fully charged then switches to the Float Mode.
FLOAT MODE: The charger maintains the battery and monitors its capacity.
USER FRIENLDY FUSE SYSTEM: The design allows easy access to all fuses without disassembling the charger. The line-input fuse is integrated with the IEC universal plug and carries also with it a replacement. The output fuse is located beside the output connectors and is an easily replaceable ATC automotive fuse.
SWITCHMODE TECHNOLOGY: Charger uses much less power than standard linear chargers and the design has an above 78% efficiency. Full metal (aluminum) housing reduces E.M.I. emissions drastically.
NOTE: Regulating Parameters, Charge Algorithms, Output Lead Assemblies and Accessories can be altered, at the factory, to suit your particular application and requirements. Call today to receive a personalized quote and/or to speak with one of our representatives who would be happy to help you with your application questions.
1 Year Warranty