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12VDC 500MA 2-STAGE CHARGER FOR LEAD-ACID BATTERIES

CAT # BC-212 (24 Reviews) Write a Review

$14.00 each
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Product Description
Designed to maintain maximum performance from your sealed lead acid batteries. Dual stage output and regulated current control to insure that no damage occurs while battery remains on charger. "Fast-charge" cycle of 15Vdc, 500mA brings battery to fully charged state at which point the float-charge takes over, maintaining the battery at a constant 13.8 Vdc. LED indicators; red indicates fast-charge, green indicates power-on and float-charge. Screw terminals allow user to attach desired cable and connector. UL.
WARNING: May cause cancer or reproductive harm.
California Prop. 65
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Customer Reviews (24 Reviews)

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Inexpensive reverse polarity repair

Reviewer: from OXFORD, MS US

If you do accidentally kill one of these by reversing the connections to the battery, you may be able to fix it inexpensively. To open the case you'll need a tri-wing bit. These can be found in in many "security" bit sets for cordless drills, e.g. All Electronics CAT # BT-33. When I opened my dead charger, I found that the LM-7812 three terminal regulator had blown up. The other components were fine, so I removed the remains of the 7812 and soldered in a new one. That's all it took to fix it. All Electronics sells the 7812 regulator as CAT # 7812T for 50 cents each.

68 of 206 people found this review helpful. Do you? Yes No

Reverse Polarity Protection - reasons for it not b

Reviewer: from ALISO VIEJO, CA US

Providing reverse polarity protection (RVP) in a charger sacrifices regulation and voltage compensation - which are both necessary. To add reverse polarity protection, buy a small enclosure, big enough for a fuseholder and a 4 amp, 50 PIV diode. Connect the diode directly across the charger output. The cathode (band) of the diode is conneced to the + charger output, and the anode (unmarked) end to the - charger output. Now, connect the + battery clip lead in series with the fuseholder, and the - battery lead connected to the - charger output. Connect the other fuseholder terminal to the + charger output. Use a 1 amp, slow blow fuse in the fusholder. Under normal use, the battery charges through the fuse, which is sized appropriately, and no current flows throuth the diode. If you should reverse the charger cables to the battery, the diode is forward biased, the fuse blows, and the charger is fine.
Even with this mod, CHECK THE POLARITY OF THE BATTERY CLIPS - to permit charging.

4 of 4 people found this review helpful. Do you? Yes No

no reverse polarity protection

Reviewer: from Marietta GA

my 15 year old grandson demonstrated that this charger is not protected from reverse polarity connections. One second after he hooked it up incorrectly, it was dead. Other than that, I was pleased with it for maintaining my inventory of gel batteries.

3 of 3 people found this review helpful. Do you? Yes No

Gets pretty hot

Reviewer: from LAFAYETTE, CA US

This unit won't pull up a fully discharged battery. And it gets very hot in operation - enough to fill up the room with a plasticky smell. I'm afraid to let it run unattended.

Batteries are expensive, so it makes sense to use a decent charger if you can afford it. EDITORS NOTE: It sounds like you either overcharged the batteries or got the polarity backwards.

2 of 3 people found this review helpful. Do you? Yes No

Died on first use

Reviewer: from Alcester, South Dakota

The first time I plugged this charger in and connected it to a battery, it died. That was several weeks ago. I just got around to taking it apart to look for the problem. The positive wire from the circuit board is connected to the negative terminal of the charger and the negative wire from the circuit board is connected to the positive terminal. So, when I connected it to the battery, it was backwards, no wonder it didn't work.
I'm going to order another one, this time I'll check the output with a volt meter bofore I connect it to the battery.

2 of 2 people found this review helpful. Do you? Yes No
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