Battery or charger

Started by Andy K in sci.electronics.design3 years ago 4 replies

My battery in my Alcatel phone will no longer charge. How can I tell if the charger is bad or the battery ? The charger connector is too...

My battery in my Alcatel phone will no longer charge. How can I tell if the charger is bad or the battery ? The charger connector is too small to test with a voltmeter. Thanks.


Charger recommendations

Started by Andy in sci.electronics.design9 months ago 17 replies

I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital...

I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital Battery Charger. What do you recommend ? I read where 26650 have a higher capacity than 18650s. Andy


HOT HOT HOT - Battery

Started by Anonymous in sci.electronics.design5 months ago 6 replies

I was testing out an old 10A 12V auto battery charger. I had just replaced the nearly dead AA Alkaline batteries in my LED flashlight. Just for...

I was testing out an old 10A 12V auto battery charger. I had just replaced the nearly dead AA Alkaline batteries in my LED flashlight. Just for grins, I connected the battery charger to one of those AA batteries. Holy shit, in seconds that battery was so hot it burned my fingers. Thats when the reset button kicked off on the battery charger. Since that charger is rated at 10A, that 1.5V A...


How does this balance charger battery sensing work?

Started by John Doe in sci.electronics.design1 year ago 2 replies

My writing below the link might be more concise. I bought a "balance charger" that allegedly tries to evenly charge every cell in a battery...

My writing below the link might be more concise. I bought a "balance charger" that allegedly tries to evenly charge every cell in a battery pack. Apparently the individual cell voltages are correctly displayed. The battery pack to be charged has four wires. It is connected to the "balance charger" as in the links below. The balance charger has four sensing circuit leads, two of them ...


NiMH charger recommendations?

Started by DaveC in sci.electronics.design7 years ago 25 replies

First of all, this is a request for a *recommendation*, not a request for someone to do Google searches for me. - - - I need a charger for AA,...

First of all, this is a request for a *recommendation*, not a request for someone to do Google searches for me. - - - I need a charger for AA, AAA, and 9v batteries. Four of the AA or AAA at a time is OK. I see very few that support all these batteries (Maha makes a separate charger for 9v). Of those that do, not all use delta-V termination (or don't specify). Of those remaining th...


Phone Charging

Started by rickman in sci.electronics.design11 months ago 12 replies

A friend has an old Motorolla W376g phone and the charger can't be found. I can get it to charge from a car charger I use as well as from a...

A friend has an old Motorolla W376g phone and the charger can't be found. I can get it to charge from a car charger I use as well as from a desktop multi-outlet charger I have. But a couple of different wall wart chargers won't charge it while they will charge any of my devices. I did a search and can't find any details on why this might not work other than that Motorola warns to only...


biwecity Li-Ion charger on E-Bay

Started by legg in sci.electronics.design4 months ago

biwecity currently has multiple listings for a 36V Li-Ion battery charger. One example is item 322458751129. All have the same listing...

biwecity currently has multiple listings for a 36V Li-Ion battery charger. One example is item 322458751129. All have the same listing illustration and description as a 42V 2A charger for 110-240VAC input: http://ve3ute.ca/query/JC4202_charger_correct.jpg An observant purchaser could probably note irregularities in the product's labeling, but this is not unusual in off-shore sourced ...


SLA charger

Started by Anonymous in sci.electronics.design8 months ago 6 replies

What would be a good multi-stage charger for 12-15Ah 24v SLAs? I'm in UK. Thanks. NT

What would be a good multi-stage charger for 12-15Ah 24v SLAs? I'm in UK. Thanks. NT


Adding a 6v boost to a 12v battery charger

Started by Too_Many_Tools in sci.electronics.design9 years ago 26 replies

I have access to a Schumacher wheeled battery charger that is 12 v only. I want to use its boost feature (200amp) on 6 volt systems. Any...

I have access to a Schumacher wheeled battery charger that is 12 v only. I want to use its boost feature (200amp) on 6 volt systems. Any suggestions as to how to make a mod where the charger will do both 12v and 6v? I have looked and have not found any schematics. I am assuming that any mods will be downstream of the transformer. Thanks for any suggestions. TMT


Li-Ion questions (charger, fast-cycling)

Started by Joerg in sci.electronics.design2 years ago 14 replies

Hi Folks, Just bought another Li-Ion deal with charger: https://images-na.ssl-images-amazon.com/images/I/41HL6Xmx1qL._SX466_.jpg The...

Hi Folks, Just bought another Li-Ion deal with charger: https://images-na.ssl-images-amazon.com/images/I/41HL6Xmx1qL._SX466_.jpg The charger is like this little guy, a switcher that can deliver 1 amp: https://images-na.ssl-images-amazon.com/images/I/41HL6Xmx1qL._SX466_.jpg The typical battery is two cell bundles in series so 8.4V max. To my surprise the charger has 10.2V open loop...


neede simple pwm controller

Started by Yzordderrex in sci.electronics.design7 months ago 7 replies

I am looking at doing a multi-purpose experimental battery charger board. (M-PEBCB). I use a 48v battery grid to run my house. It is 8...

I am looking at doing a multi-purpose experimental battery charger board. (M-PEBCB). I use a 48v battery grid to run my house. It is 8 strings of 27M deep cycle Sears Die Hard. I am looking to do a 100A/48V charger w/PFC. I also have a 12v charger that needs a controller and I would also like to experiment with MPPT algorithms. I intend to use a PIC to develop the current command signal. ...


Heliotropic tracker

Started by Chris in sci.electronics.design3 years ago 58 replies

Say I have (for example) a cellphone charger that uses sunlight to charge the phone. The phone and charger are in an attic room with one small...

Say I have (for example) a cellphone charger that uses sunlight to charge the phone. The phone and charger are in an attic room with one small roof window so as the sun moves around the sky, the small patch of sunlight slowly creeps from one side of the floor to the other. How could one best implement a mechanism to track the sun's movement and keep that charger in the sunny patch at all...


Forever Power (almost)

Started by Anonymous in sci.electronics.design1 year ago 27 replies

This is just a stupid idea that I had, which will acomplish nothing, other than see how long it lasts. I dont know how much a standard 12V 5...

This is just a stupid idea that I had, which will acomplish nothing, other than see how long it lasts. I dont know how much a standard 12V 5 amp battery charger requires from the 120Vac power line, but I read it was around 150 watts. So, lets say I connect a 200W inverter to a car battery. Then plug into that inverter, a 12V 5A battery charger, and connect the leads from that charger to...


Using an AA battery charger to charge D cells

Started by Anonymous in sci.electronics.design2 months ago 11 replies

I have a battery charger which only fits AA and AAA batteries. I recently bought a Maglight flashlight, which uses three D cells. I want to put...

I have a battery charger which only fits AA and AAA batteries. I recently bought a Maglight flashlight, which uses three D cells. I want to put rechargable batteries in it, but I have no way of charging them, unless I buy another (expensive) charger. It seems that almost all battery chargers these days are only for the AA and AAA batteries. There are only a few that charge the C and D cells, ...


Charger for SLA 12V / 7Ah battery

Started by gm in sci.electronics.design3 years ago 32 replies

The subject says all :-) I connected 3 x 12V / 7Ah battery's is serial and start to charge them with my ebike 36V/1,2A charger. After cca 30...

The subject says all :-) I connected 3 x 12V / 7Ah battery's is serial and start to charge them with my ebike 36V/1,2A charger. After cca 30 minutes battery pack was getting hot, so i disconnect the whole stuff. What is the highest charging current for such battery's ? The funny thing is that i use the same charger to recharge my 36V ebike battery pack, and there was no problems whats...


Will a dimmer switch work instead of an incandescent light bulb in a simple battery charger?

Started by Anonymous in sci.electronics.design5 years ago 42 replies

The other day, I came upon this: http://www.alpharubicon.com/elect/3dollarb= attggn.htm It's plans for a very simple battery charger that uses...

The other day, I came upon this: http://www.alpharubicon.com/elect/3dollarb= attggn.htm It's plans for a very simple battery charger that uses a light bulb and dio= de in series to make a constant current battery charger. Benefits include p= ulse charging for desulfation and the fact that it can charge batteries of = any voltage. Well, with incandescent light bulbs getting scarce and me ...


Charge 2 x 6V on 12V Charger

Started by Olin Frank in sci.electronics.design7 years ago 117 replies

If I have two 6V SLA's of the same brand, capacity, and past usage, can I safely series wire them to charge with my existing 12V charger? Olin...

If I have two 6V SLA's of the same brand, capacity, and past usage, can I safely series wire them to charge with my existing 12V charger? Olin Frank


Charge gel cell with car charger?

Started by Mike Cook in sci.electronics.design6 years ago 89 replies

A friend has a battery powered Ryobi lawn trimmer ("weed whacker") which doesn't work. The 12vdc wall wart puts out only ~ 12.4v. I charged...

A friend has a battery powered Ryobi lawn trimmer ("weed whacker") which doesn't work. The 12vdc wall wart puts out only ~ 12.4v. I charged the lead-acid gel cell using a car charger. The charge rate (selectable) was 0.5A. Afterward the trimmer seemed to work as new. Can the car charger be used to charge this battery? He can install a timer to limit charge time if that's something req...


LiPo charging

Started by Andy in sci.electronics.design11 months ago 9 replies

Can I use the same charger I use for my 18650 batteries with a LiPo battery? LiPo battery is 500 mah. Charger puts out 450 ma. Thanks.

Can I use the same charger I use for my 18650 batteries with a LiPo battery? LiPo battery is 500 mah. Charger puts out 450 ma. Thanks.


Good Emergency Phone Charger

Started by David Eather in sci.electronics.design7 years ago 8 replies

I've been looking for one of these that is worth having. I tried plenty of lithium emergency battery charger packs. Most had appalling...

I've been looking for one of these that is worth having. I tried plenty of lithium emergency battery charger packs. Most had appalling efficiency or were badly made or had batteries so bloated from overcharging the product couldn't be re-assembled after a visual inspection. Some had all the faults combined. I looked at single cell AA - 5 volt chargers and again it was mixed. Some were...