Old UPS as car battery charger

**aioshin** · August 21st, 2017 01:27 PM

Got my car battery drained for unknown reason yet and cannot start my hilander anymore, i dont have a battery charger but found this very old ups that has a none working battery. So i open the ups, removed the old battery and rewire so i can connect the + - wire to the car battery corresponding terminal hoping it can charge. Charged it for 6hours and it works, it able to revive my battery and start my car.

Just sharing coz its working.

Sent from a mobile device.

**ParticleX** · August 21st, 2017 05:13 PM

ako naman i use an old 3SM batt for the desktop and kung merong brownouts as an inverter

gumagamit nga lang ako ng car batt charger after severely draining it as the charging circuitry is only designed for the smaller batt

**CVT** · August 21st, 2017 06:39 PM

Thanks for sharing bro.

I am using a 13.8V (12V) power supply to charge a "dead battery" for as long as all the cells are functional. This was the power supply I use for my HAM (rated at 25A).

The battery in this case acts as a "voltage regulator" and so the charging.....

**dr. d** · August 21st, 2017 07:51 PM

Originally Posted by aioshin

Got my car battery drained for unknown reason yet and cannot start my hilander anymore, i dont have a battery charger but found this very old ups that has a none working battery. So i open the ups, removed the old battery and rewire so i can connect the + - wire to the car battery corresponding terminal hoping it can charge. Charged it for 6hours and it works, it able to revive my battery and start my car.

Just sharing coz its working.

Sent from a mobile device.

great idea!
recycle!

**Vodka** · August 22nd, 2017 12:18 AM

good job! better yet get a hobby charger like the imax B6. i got mine, just a cheap clone, from hobbyking for something like $16. charges li-ion, nimh, lead acid, of various voltages. super useful

or if you can afford it get an iCharger of which i have 3 now

they're just so frikkin useful

**jaypee10** · August 22nd, 2017 04:51 PM

kumuha si TS ng 12volts dun sa secondary ng transformer ,tapos nilagyan kahit isang rectifier diode.pwede na...

**aioshin** · August 23rd, 2017 08:49 AM

Originally Posted by jaypee10

kumuha si TS ng 12volts dun sa secondary ng transformer ,tapos nilagyan kahit isang rectifier diode.pwede na...

Ang UPS, meron talagang charger for 12 volts, so no need to connect a rectifier or diode para makapag charge, you just need to connect the charging terminal to the car battery. Yun na yun.

**jvnj** · August 23rd, 2017 09:17 AM

Originally Posted by aioshin

Ang UPS, meron talagang charger for 12 volts, so no need to connect a rectifier or diode para makapag charge, you just need to connect the charging terminal to the car battery. Yun na yun.

Pinoy Ingenuity! Galing Sir! Ma try nga sa Genset Battery namin, nasira na kasi yung float charger nya. I believe pareho din naman yung functions nya.

**rudy_corolla** · August 23rd, 2017 09:46 AM

Medyo delikado ito, wala kang fuse sa secondary ng transformer. tapos payat ng wire mo, pwedeng masunog yan. if you want to do this again do it outside your house, yung battery kapag nagka-problema may chemical reaction yan na naglalabas ng dangerous gas

**aioshin** · August 23rd, 2017 11:35 AM

Originally Posted by rudy_corolla

Medyo delikado ito, wala kang fuse sa secondary ng transformer. tapos payat ng wire mo, pwedeng masunog yan. if you want to do this again do it outside your house, yung battery kapag nagka-problema may chemical reaction yan na naglalabas ng dangerous gas

Yeah, thanks for pointing dun sa wire, kaya dun sa second image, pinalitan ko na ng medyo kapareha nung wire sa loob nung UPS. Actually medyo maliit lang amperahe nung UPS for 12VDC kaya medyo matagal ang charging time and yes, thanks, its safe to do it outside the house.