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How do I recharge ,SLA battery safely?

Sep 26th 2018, 18:38


Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
The jerk on the phone said he was sending me SLA batteries for my mobility scooter, nut they have "F-1" terminals and don't fit. N either will the charger for the scooter fit them. I have a 12 volt power supply and I can get anderson pole adapters to fit the F-1 terminal. What else do I need to charge the batteries safely?
Sep 27th 2018, 10:14


Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
It is possible to manually charge batteries, but it is a lot of hassle considering that chargers are relatively cheap. You should have a series diode to protect the power supply. 723 based Astron power supplies typically fail when connected to a battery for charging and the power goes off. You can vary the voltage manually to get the right amount of charging current, and disconnect the battery when it is charged.

Zak Lau W1VT
ARRL Senior Lab Engineer

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