My new Battery Tender Plus gets almost too hot to touch during use. Is that normal? The battery shows 12.85v and the charger is still on the full charge mode (red light). Battery is a new Energizer Deep Cycle RV/Marine.
891206
Mine got uncomfortably hot too while it was charging my truck battery back up. I set it on a brick and actually let a small fan blow on it (which surprisingly cooled it off) But after 2 days like that, it reached a point where it blinked green, and eventually went solid green. And once it went green it cooled off - presumably drawing far less current. I'd guess your battery is fairly depleted and must be given some time to charge back up. If you are concerned or feel it's a safety issue - call the company.
309045
The radio/battery is warmer to touch when charging, but does't get hot. Charge in a ventilated area and do not over charge.
135878
A lot of times gps features in cell phones will make them get hot when powered on. Doubtful this has anything to do with charger. I would make sure output matches that of your phone's original charger.
445829
My battery tender stays connected all the time. It only comes on when the battery needs charging. It has a red and a green light to tell you what mode it is in. Solar energy used for charging should not make a difference.
1412388
I keep my bike in an unheated garage, but then I live in the high desert..elevation around 4000 feet. I haven't used the charger during the coldest part of our year yet...that's coming around the corner. Right now our night temps are around 40 to 50....not too bad...and the charger works like a champ. The true test will be late Dec to late Feb. I'll be able to answer your question after I've had the charger for a season.
1032669
Due to the compact design and relatively high charging current, batteries can become toasty hot _if_ the BCG34HRE missed termination signal (negative dV/dt) - especially with the charger cover closed. I did an experiment by charging four nearly full Rayovac 4.0 Hybrid AA cells together (this is to force the worst-case scenario where all batteries are being over-charged), and measured the cell temperature with an infrared thermometer. The highest temperature recorded was 62 degree C, which is too hot to hold for most people, but not high enough to cause a meltdown. Note that this will NOT happen if you recharge partially exhausted cells (because then the charger can terminate correctly by detecting negative dV/dt). But to be safe, I recommend charging with the cover open or removed.
223355
Well, most of the time high temperatures means way up in the 100s degree, I don't think anybody uses that battery charger in those hot temperatures, and the only reason they say that is because heat decreases the battery life, you are not gonna use that in high temperatures are you?
1213001
Best to charge the battery with a battery charger, and "Maintain" the charge with the battery tender. If you have a large battery, it could take quite a while to charge it with the battery tender.
2013789
I am using two units on my RV, one for the coach batteries and another for the chassis batteries. The RV is outside and our temps got down to +14 deg F last week. There does not seem to be any problem with them operating at least down to that temp.
1243988
I have heard of people doing it with any charger, but it is dangerous and can easily cause a fire!! If you want to do it, do it outside in a safe place. You have to jolt it back to life with the NiMh or NiCd charge first, you have to get it above the dreaded 3amps. I have never done it but have friends who have, and yes they have burst one or two into flames!! I have also heard of them changing polarity, but have never seen that happen. I would highly recommend getting a laser temp gun to monitor the battery wile trying to get it back to 3amps. But like I said, THIS IS DANGEROUS AND IT IS BEST NOT TO TRY IT!!
1486252
My experience is, it does not get hot at all. I have two batteries on charge all the time in this, as well as one on the original charger. Based upon my experience - Yes it is defective.
717322
Yes. This is due to the charge rate of the charger. Any batteries used will get hot. This is not a healthy practice because it reduces the life of the batteries. However I knew this when I did the purchase. I really wanted the DC charge option. I use a cheap Sanyo one at home. So I only use this charger if I am on the road or in a hurry at home. La Crosse has great chargers BUT you got to pay the extra dollar for them.
691450
If the red light is the only one that comes on your battery is probably too hot. Let it cool down or even put it in the refer for awhile. That has worked for me.
717321
Any battery under a charging condition will get hot,reason as elecricity passes to its inner cells to charge them,they will get warm/hot,same as using an electric blanket,where one will not feel the wormth of it until it is pluged in.I hope I have answered your question to your satisfaction.karl lawar
882967
Not at all normal. I would suspect a short in the battery, unless it charges well otherwise. If it charges correctly on another charger, you should exchange this charger.
1372968
I think it might be that your battery is dead, LiIon batteries are highly sensitive to overcharge, meaning that they are damaged when you keep your charger connected after it has reached 100% charge. Get a new battery and try to avoid extreme charge states (full discharge and overcharge) are bad for your battery, dont let it fall under 20% and dont chrage it over 95%!! Hope this is helpful
1558193
I use a charger that is 1.5 amps from Chamberlin, seams to work great. I don't use my battery Tender charger after using this unit. It also does not get hot like the tender and will automatically slow charge and maintain 6v or 12 v batteries.