I tried to charge my 12V motorcycle dead battery and never charged it. I used the clamps as they come, red&gt;pos &amp; black&gt;neg. Should I try'em backwards?
452632
The polarity is correct. This unit will not charge a dead battery. It only outputs enough power to maintain a charged one. You will need a plug-in style charger that outputs about 14 volts at approx. 2 amps for 6 hours or so, then test the battery. Charge it at a low rate to try to revive it. If it comes back and holds charge, it should read about 12.8 volts fully charged.
1276525
I just plugged mine in while power is off on motorcycle. There's no indication its charging, no light or sign its charging, but after a few hours its good to go.
543311
If they work fine in a drill or impact then maybe it is your saw. If they will not charge at all I have heard stories of other people having trouble with the chips in the battery going bad on Makita brand batteries. I think that is why i've seen people recommend that you fully discharge the battery befor charging it. I'm not an expert, but if that happened I don't know if their is any way to fix it. Check your lights on the charger and see if there's a error light. Maybe get a hold of the manufacturer. Good Luck!
1688949
My bike that had the clamp on it was stolen, so now I have a light, but no clamp. Any suggestions? I've since bought better lights, but a backup is nice to have.
1340925
If you have access to a multimeter check to make sure your batteries are actually charged. If not maybe someone you know can help you or perhaps visit a local electrical supply store, Radio Shack, etc. If the batteries are fully charged, do make sure you have then installed correctly. I can't tell you how many times I've installed batteries incorrectly even though I absolutely know to check which way they go before I put them in. If your batteries are charged and they're installed correctly, then I can only assume it has something to do with the circuitry of your headlight.....could be a lot of things. Sorry to tell you that my headlight did not last long and its problem was poor quality circuitry....the circuit board in the battery compartment self-destructed. It fried itself one day while I was wearing it. If your light is now garbage, try this one: Weiita H807 Starlight LED Headlamp, 300 Lumen, available on Amazon. It's similar but much better IMO, plus the company is great to deal with. Hope this helps.
9941
I measured the output of mine plugged in to my motorcycle connection. 12.97 volts going in from the battery, output 5.1 volts so the spec from the Battery Tender website is incorrect.
546881
There should be a negative and positive terminal where you can put a wire in and clamp it as seen in the picture near the bottom corner the two terminals. You'll need to take a 9V battery and get one of those connectors where it connects to both of the battery's leads and turns them into a red and black wire. Put those wires into the terminals respectively and it should be powered
383662
My battery came charged but not fully charged. It would start the bike BUT when hooked to my charger the "red" light did NOT immediately go green. I charged it overnight and haven't had a problem since.
32343
After you plugged the attachment did you reboot the phone before trying to charge? are you judging it is not working because the lighting symbol is not showing up? that happens on my first gen MotoX... i use a third party app (Curve fish battery widget) to indicate that charging is happening.
510044
I'm sure that would work. Buy a small 12-volt battery (motorcycle battery should work) and wire it so that you can remove the positive and negative leads from the battery when not in use. Good luck to you.
187902
Dear Pirl, I can assist you purchasing the right batteries for the right application.What will be the main purpose for the batteries?You can also find you a 36volt light at TNC Scooters82 Dellwood DrJackson, TN 38301Telephone:901-734-4207Tell them Dave Rousselle sent you.If this is being used for an electric bike, the I would need to know what type of controller and motor that is being used.A good place for a 36v 12ah battery pack is at " thesuperkids.com"
407397
disconnect before doing any "welding"; make sure when you charge battery is hooked up correctly - red to hot, black to ground. this is a "pig-tail" that you put on a Motorcycle, Garden Tractor, Snow Blower...that sits for quite awhile each year, then can plug "battery - minder - charger in - prior to use" to "top off" or "maintain" charge during the winter....
1750079
Should work. Mine does. Can you check amps from unit charger on battery with amp meter? Try again, recharge unit, clamps with good connection and try on dead battery and measure amps. If bad return to Amazon. Good luck
1561066
The way I had to do it was look at the battery terminal, one is + one is - and the other is a T. I don't have it in front of me but I aligned the terminals on the battery to the pins on the charger. I think the battery was always flipped over with it's back showing. It did charge a couple times. We just came back from Hawaii. I thought maybe it was the cruise ship's wiring, but at home it did the same thing, would not charge no matter what i did or what battery I used.
464620
Yes, it should work well for motorcycle batteries; in fact for almost any small 12 volt battery. Note that it will work as a MAINTAINER for both large and small batteries, but as a CHARGER only for the small ones, probably including your motorcycle battery. I believe that the manufacturer has published data regarding the sizes (capacities) that the unit is capable of charging. I hope that helps...
1328411
that easy! if you look at the battery they are mark in black , the left first pin is (pos) and the right last pin is (neg), again just look at the battery pins there should be mark!!!. the middle pin are for chargering use only. ok!!
867834
I had a bad battery. Make sure you charge the battery correctly. These are balance battery.