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Questions tagged [battery-charging]

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20
votes
2answers
813 views

Should I keep laptop and cellphone batteries fully charged, let them die before charging, or something in between?

Generally, is it better to let laptop and cellphone batteries fully die before recharging, to leave them plugged in constantly even when charged and not in use, or to unplug them once they are fully ...
11
votes
1answer
3k views

Trickle-charging batteries for outdoor usage/ wind turbine suggestions

I have a Shimano Hub Dynamo wheel from an old bike, I intend on turning into a small wind-turbine, probably starting off like this but being modded further when I have the time. My modest aim is to ...
10
votes
1answer
135 views

Does it matter where I charge my device?

I have a number of small devices that can be charged in my car (using a charger that plugs into the car's electrical system and is powered by the car's gasoline engine) or my home (using electricity ...
8
votes
4answers
231 views

To what extent (if any) are electric vehicle batteries recyclable?

Are there any existing procedures for the recycling of electric vehicle car batteries, and if so what are they? In particular I'm interested in those used in the Volkswagen E-Golf, though general ...
6
votes
2answers
94 views

The more miles a car drives, the more economical battery packs become?

I was reading here: Here’s How Electric Cars Will Cause the Next Oil Crisis, that the more miles an EV drives, the more economical battery packs become. I don't understand this assertion. I see ...
5
votes
1answer
203 views

Battery Positive Terminal Growth

I'm living in an off-grid house with battery power storage. Batteries are one of the most expensive and problem prone aspects of off-grid power. I have a battery bank in which some of the batteries ...
5
votes
1answer
54 views

Is charging Tesla Model 3 at 110v/15amp less energy efficient than at 220v/30amp?

I have a rudimentary understanding of volts and amps. (Volts is like pressure and Amps are like the bandwidth of that pressure.) So just reasoning about it, I imagine charging to be an event where the ...
4
votes
1answer
185 views

Forgot rechargeable batteries in the charger

I left rechargeable AA batteries in the charger for 3 times as much as it's recommended, that is for 36 hours. Can I still use them? Did it damage them?
4
votes
2answers
132 views

Two solar regulators to one battery bank?

I wish to connect four 250w panels to a battery bank. Each panel is rated at 15A, yet my MPPT* regulator warns against exceeding 30A. Could I add a second regulator, running two panels to each, but ...
3
votes
1answer
56 views

Will I damage batteries by charging them directly with solar outputs?

I recently picked up a few cheap, mini photovoltaics. I'm planning to wire three in parallel for a 2V, 900mA max output. I'm not well versed in battery mechanisms, and I was wondering if I would ...
3
votes
1answer
59 views

With two 50W panels best to wire in series or parallel?

Charge controller (Renogy Wanderer 10A PWM) can handle the combined voltage when wired in series. From the spec sheet, it has a max PV input voltage of 50VDC. Panels connect to a charge controller ...
0
votes
3answers
16k views

How long to charge 12v deep cycle battery?

How long would it take to charge this deep cycle battery (Amazon link) with a regular household electricity plug? Thanks.
0
votes
0answers
25 views

Solar setup for well pump

The electricity where I live is pretty expensive at about almost 30 cents a KWh, so I'm considering setting up a solar system. I got 3 100 Watt Polycrystalline solar panels a while ago, pretty cheap. ...