How to Rebuild Panasonic EY9106 Power Tool Battery Packs
Australia reliable cordless drill batteries supplier: BattAussie strive to make your power tool battery purchases easy. Since we understand that finding the right batteries for your needs can be overwhelming and confusing at times, we offer educational articles and tips to help you conserve your drill batteries and understand common problems.
Panasonic EY9106 power tool batteries only last a few years, and they cost more to replace than the entire drill kit you bought in the first place. The specs on my packs state that you should get 250 charging cycles out of them. Today BattAussie power tool battery experts show you how to rebuild Rechargable Power Tool Battery Packs.
How to Open The Panasonic EY9106 Power Tool Battery Packs for Service
There are some screws along the pack that allow it to be opened. Sometimes they are Star or Security head screw. If you can’t find a way to get a grip on them, get a Security bit set at Harbor Freight. Rub your fingers over the label to see if some of the screws are hidden underneath it.
On some cheaper import packs, they are glued together and have to be carefully cut apart. Don’t even think of trying this without a vise to securely hold the pack. Run a brand new razor blade along the seam until you can rock the pack apart.
How to Know Those Panasonic EY9106 Power Tool Battery Cells are Bad
Again, we are going to use the Volt Meter. Place one lead at the bottom and top of each cell. Cells that read 1.3V (remember this is with a fresh charge) are good. You do not have to separate any of the cells to test them. Cells that read 1.1V are going and any cell under 1V is bad. Some cells may be totally dead and not read anything. With a Sharpie, mark good cells with a “G” and put an “X” on bad cells.
You may think why bother replacing cells that are almost good, like the 1.1V ones. If you taking the time to do a quality repair, why would you want to repeat the same process in a few months when the cell finally goes? Do the job once, and do it right.
How to Get The Bad Power Tool Battery Cells Out
As you have probably noticed, the cells are spot welded together. I have never seen a pack where actual solder was used. Take a small, sharp wood chisel and push between the tab and the top of the battery. You may have to lift a little. Take your time on the first one; the rest will go like butter once you have the feel for it. Leave the tabs behind on the good batteries.
Put a piece of tape on the chisel to remind yourself to sharpen it before it goes back to the woodworking it was made for.
Iinstalling The New Power Tool Battery Cells
Using electrical tape, wrap the Panasonic EY9136 power tool battery cells tightly so they will stay in place while you solder. This will be the cells “final resting place”, so get the formation right, they have to fit back in the plastic housing. Remember these cells get warm in use, so use real UL listed tape, not masking tape or crap you got at the dollar store. Make sure you get the polarity right. All of the cells go together head to tail, positive to negative.
Use solder with a low wattage iron. Heat the tab AND the battery top so you get a good joint.
When you are done, check the contacts at the top of the drill battery pack to make sure you get the correct voltage. If you get some odd reading, you have soldered one of the batteries in backwards! Fix this right away. If your spouse or kids put the pack in the charger, it could explode or cause a fire.
Reassemble The Power Tool Battery Packs
Make sure all the battery cells are wrapped together tight with electrical tape. They should not move or shift around. Screw everything back in place and test the contacts one more time for proper voltage.
If you had a pack that had to be cut apart to open it, use PVC cement to glue it back together.
Place the pack in the charger and charge it up. It may well be a good idea to keep an eye on it the first time; you can never be too safe.
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[…] Australia reliable cordless drill batteries supplier: BattAussie strive to make your power tool battery purchases easy. Since we understand that finding the right batteries for your needs can be overwhelming and confusing at times, we offer educational articles and tips to help you conserve your drill batteries and understand common problems. Panasonic EY9106 power tool … […]