How to Make a 12 volt Battery Work Again

How to Repair a 12 Volt Battery That Was Boiled Dry

past Stephen Benham

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It's likely that a 12 volt battery that's boiled dry is a flooded-prison cell, lead-acid battery that's fitted in vehicles. It contains 6 individual cells that each produce 2 volts and the cells contain lead-plates completely covered in electrolyte fluid -- if the battery is in good status. A bombardment that'due south boiled dry out, due to being exposed to excessive rut, won't contain any fluid and sulfation may accept formed on the lead plates. It may be possible to repair the battery, depending on the level of sulfation that'south formed.

Step 1

Remove the vi plastic prison cell caps from the top of the battery. Use a screwdriver, or twist them off using your fingers.

Pace 2

Check the plates for sulfation. Look inside each individual cell. If the plates are completely covered in sulfur deposits, then much that you can't see the plates, and then in that location'due south little yous tin do and a replacement battery needs to be purchased. All the same, if at that place'due south only partial sulfur deposits and smallish crystals and parts of the plates are visible, so it'south certainly worth attempting a repair.

Step 3

Pour distilled water into each jail cell advisedly. Fill up the cells up to the maximum marker that'southward on the internal wall of each cell. Don't overfill. Leave the bombardment for five minutes and then cheque the fluid level again, since you lot will observe they demand topping up. Go out off the cell covers for the moment.

Stride 4

Connect your battery charger to the battery terminals. The red clamp connects to the "+" terminal and the black clamp connects to the "-" terminal.

Footstep 5

Select the lowest accuse setting you can on your battery charger; information technology'southward probably chosen "trickle charge." It'southward imperative you charge your bombardment slowly and for a long time to successfully repair it. For the sulfation to disperse, the distilled h2o yous poured in the cells has to alter into electrolyte, which is actually sulfuric acrid. Because your battery had boiled dry out, there was no fluid in the cells so the cells currently contain pure distilled water.

Step six

Turn on your bombardment charger and leave it to accuse your bombardment for 12 hours. After 12 hours, take a look in the cells and experience the side of the battery, merely don't turn off the charger. The bombardment casing is getting warm and pocket-sized bubbles are outset to rise in each prison cell, if the repair process is working. If the battery casing is completely cool and no bubbles are rising, there'due south little signal in continuing every bit your battery isn't taking a charge. Y'all demand to get a replacement.

Step 7

Allow the battery charge continuously for an additional 12 to xviii hours. This may seem like a long time, simply information technology'southward necessary to complete the repair. Now that yous accept seen bubbles rise, you know the repair is likely to work.

Stride 8

Turn off the charger. Remove the clamps from the battery terminals. Have a quick look in the cells -- bubbling are rising rapidly. Most, if not all, of the sulfur deposits have dispersed. The side of the battery is too fairly warm, so yous tin exist confident that your battery is repaired.

Supersede the plastic cells caps. Screw then on using your fingers and so tighten them using a screwdriver, if advisable.

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