Battery or charger

Started by Andy K in sci.electronics.design2 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.


How does this balance charger battery sensing work?

Started by John Doe in sci.electronics.design2 months 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.design6 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.design9 hours ago 7 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...


Adding a 6v boost to a 12v battery charger

Started by Too_Many_Tools in sci.electronics.design8 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.design1 year 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...


Heliotropic tracker

Started by Chris in sci.electronics.design2 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.design6 months 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...


Charger for SLA 12V / 7Ah battery

Started by gm in sci.electronics.design2 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.design4 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.design6 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.design5 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.design45 minutes ago 1 reply

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.design6 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...


SLB and charger question

Started by Andy K in sci.electronics.design4 years ago 3 replies

I would like to buy a NP 4-6 Yuasa 6 Volt 4 Amp Hour Battery. Would this charger work and how do I determine how long to recharge a discharged...

I would like to buy a NP 4-6 Yuasa 6 Volt 4 Amp Hour Battery. Would this charger work and how do I determine how long to recharge a discharged battery ? Model: HB-0702-01 Input: AC100-240V 50-60Hz 0.2A Output: DC7.2V 1.0A I would be powering some led lights that operate at 3.0 volts, so I would need to find out how to step down the voltage as well. Thanks.


Somewhat over-engineered for a lipo charger?

Started by Cursitor Doom in sci.electronics.design2 years ago 13 replies

I think the guy who designed this single cell charger for LiPo batteries must have been paid by number of components used. I've no idea what...

I think the guy who designed this single cell charger for LiPo batteries must have been paid by number of components used. I've no idea what half of this stuff is supposed to do. This model was produced in 2002 for a couple of years. What d'yall make of it? Only the first 3 pictures in this folder, guys. The rest of the pictures are of something else entirely out of a scope, so just i...


OT: Lead Acid Float Charger

Started by Jim Thompson in sci.electronics.design1 year ago 79 replies

I drive my pick-em-up truck every few months. So the battery is dead when I go to use it... like today :-( I'm looking for recommendations...

I drive my pick-em-up truck every few months. So the battery is dead when I go to use it... like today :-( I'm looking for recommendations for the _best_ (*) float charger I can buy to just plug the truck into when it's parked. (*) Cost no object. ...Jim Thompson -- | James E.Thompson | mens | | Analo...


Battery charger with solar panel

Started by gm in sci.electronics.design9 months ago 20 replies

Hi to all. Did someone try this approach: http://cds.linear.com/image/314_circuit_1.jpg when designing solar charger ? Power consumption...

Hi to all. Did someone try this approach: http://cds.linear.com/image/314_circuit_1.jpg when designing solar charger ? Power consumption will be under 75Wh per day.. Other infos: - solar panel 15W - battery 12V / 7Ah GM


High current pcb

Started by George Jefferson in sci.electronics.design7 years ago 31 replies

I want to replace a CT full wave rectifier for a 200A+ battery charger with a active rectifying...

I want to replace a CT full wave rectifier for a 200A+ battery charger with a active rectifying system. http://www.nxp.com/documents/data_sheet/PSMN2R5-30YL.pdf Are some 100A 80W logic level fets which means I can parallel 3 or 4 of them and increase the efficiency of the charger(there are other reasons for doing it too). I'll be driving the mosfets using a driver circuit instead of...


Battery Charger Design

Started by thorin92 in sci.electronics.design8 years ago 28 replies

Dear group, I am trying to design a battery charger for this...

Dear group, I am trying to design a battery charger for this battery: http://uk.farnell.com/varta/55615605940/battery-pcb-mount-6v-5-v150h/dp/863981 I'm familiar with voltage regulators and current limiting etc. but am unsure what parameters to use? If I simply provide 6v limited to 70mA will this work? Thanks in advance