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#1
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Battery Charger dead on cordless drill.
I picked up a Toolshop brand cordless drill at a garage sale. It was
only $1.00 so I took a chance, and the tips and drill bits that came with it are worth a buck. The drill is clean, and the battery appears fairly new, since it's cleaner than the drill. (Of course appearance really dont matter). The charger on the other hand is dirty and was filled with crud in the battery hole. This charger is a 2 piece type. The stand where the battery goes, and a wall wart which plugs into the stand. However, the red LED dont light with or without the battery, so I measured it with a meter and it's not putting out any voltage. (should be 18V DC) I know Toolshop is a Menards brand. I actually have several of their corded tools and have been very satisfied with them. Anyhow, I'm sure a replacement charger is probably costly, and since I dont know if the drill and battery work, I'm not going to spend money on it, unless I find one cheap on ebay. But I often see Wall Warts at Goodwill and other similar stores. I'm wondering if I was to find an 18VDC one with enough amperage, if I could just plug that into the base? Anyone ever tried such a thing? Actually I'm wondering what would happen if I hooked a 12V auto battery charger to that base. I know it wont get a full charge, but if I can just get some charge into the battery, I'll know if the drill works. Thanks |
#2
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Battery Charger dead on cordless drill.
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#3
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Battery Charger dead on cordless drill.
Jerry,
Does the wall wart work? What is it supposed to supply? How much time and money do you want to spend on this project.? Dave M. |
#4
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Battery Charger dead on cordless drill.
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#5
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Battery Charger dead on cordless drill.
On 6/17/2015 2:39 AM, mike wrote:
FWIW, I have never purchased a used working drill with a usable battery...that's why they're for sale, it costs more for a battery than a new drill. If they broke the drill, sometimes the battery is ok. So I have a box full of mismatched drills and batteries. A lot of the power tools still use NiCad batteries which can be fixed when they develop a short. You need to zap the individual cell with a high current from a large capacitor, or a high current DC power supply. Doesn't work for NiMH or Li-Ion. |
#6
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Battery Charger dead on cordless drill.
You should measure for output from the wall-wart before doing anything else.. For a 12V power pack, the no-load output from the wall-wart could be anywhere from 12 - 18V AC. It is possible that the rectifier diodes are also in the wall-wart. In that case, you should see about 15V DC. The label on the case of the wall-wart might indicate what the output voltage should be.
To measure the voltage, use pins to break thru the insulation on the wires from the wall-wart to the battery stand, and connect the voltmeter to the pins. Insert each pin far enough away from the other pin so that they cannot accidently touch each other (learned that the hard way many years ago(grin)). Let us know what you find out, and then we can give further advice, such as what to do about shorted NICAD cells, as another poster has mentioned, many of those short failures can be repaired . |
#7
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Battery Charger dead on cordless drill.
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#8
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Battery Charger dead on cordless drill.
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#9
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Battery Charger dead on cordless drill.
On 6/17/2015 2:39 PM, sms wrote:
On 6/17/2015 2:39 AM, mike wrote: FWIW, I have never purchased a used working drill with a usable battery...that's why they're for sale, it costs more for a battery than a new drill. If they broke the drill, sometimes the battery is ok. So I have a box full of mismatched drills and batteries. A lot of the power tools still use NiCad batteries which can be fixed when they develop a short. You need to zap the individual cell with a high current from a large capacitor, or a high current DC power supply. Doesn't work for NiMH or Li-Ion. From the tone of a posting, you can often infer the level of experience and equipment available to the poster. I try to present input in a language and level of detail appropriate for the situation. Based on the question, I'd bet that the OP doesn't have the stuff required for safe dendrite blasting. FWIW, I've never had much luck blasting a battery. I have had some limited success blasting individual cells. A dendrite is a short. When you blast it out, you make the hole in the separator even bigger. Self discharge makes the pack useless unless you charge it and use it immediately. And the short returns eventually. If you're not paying close attention, you can ruin the new wall wart too. I've tried replacing individual cells from another bad pack. Never had much luck with that either. If the packs are abused and shorting, it's just a matter of when the next domino will fall. |
#11
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Battery Charger dead on cordless drill.
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#12
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Battery Charger dead on cordless drill.
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