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Questions tagged [battery]

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What battery should I choose?

Is there any battery that can fulfill the given requirements: High energy output Volume not more than approximately 9cm × 4cm × 2cm Rechargeable (if rechargeable it's good, if not it's fine too) Won'...
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1 vote
1 answer
29 views

USB device to draw constant small current to prevent power bank from shutting off

Most external USB power banks nowadays will shut off if the device connected to them stops drawing current. This guy modded an USB measuring stick by adding two resistors to accomplish basically what ...
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How to detect the voltage of a brushless motor

I took apart the battery and brushless motor from my e-skateboard and want to use it in my own project. And here is the product manual if it helps. I really want to re-use the existing hardware, i.e. ...
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1 answer
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Battery upgrade for HP 15-BS laptop

I am using an HP Laptop 15-BS series for the last 4 years. For the past few days, I have been experiencing that the laptop's battery is not providing enough backup. Below are the specs of this battery ...
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Battery powered single board computer with BLE or WiFi and a & IP67 housing

I need an IP67 housing with a dev board for a project in a damp environment. It must have either BLE (preferable) or WiFi. I use ESP32 generally (which has noth BLE & WiFi for around $3), but am ...
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Li-Ion Polymer battery capacity tester - like Opus Bt-3100 for 18650

What Searching for capacity tester for LiPo batteries, which runs full cycle (charge, discharge, charge) and displays accurate battery capacity. I am looking for same features as Opus BT-C3100, which ...
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  • 101
1 vote
2 answers
34 views

Alternative to lead-acid computer battery backup?

I had a CyberPower 10-outlet unit installed to protect the computer in my home office. Very soon the smoke detector just outside my office door started to sound every few hours. Having removed the ...
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1 vote
1 answer
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Best time for charging battery

My laptop has 2 batteries. The laptop uses one of them until 5% and then starts using another one. Isn't this percentage bad and harmful for first battery? Details: Vendor: LGC Model: 45N1735 ...
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1 answer
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Good battery charger for AA+AAA batteries, especially for older batteries that don't charge well in other chargers

I currently have a cheap budget AA & AAA charger which can only charge batteries in pairs of two, and which does not do a good job on older batteries. I'm looking for a good quality charger with ...
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1 vote
3 answers
2k views

USB mouse vs. Bluetooth mouse -- less battery drain

Which would drain a laptop battery less, a USB (LED) mouse or a bluetooth mouse? Nothing fancy, just a basic travel 3 button mouse in each case.
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2 answers
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Looking for low-mid phone with good battery & screen

I need a new phone to replace a Moto G7 Power that I dropped in a lake. I would buy it again but I can't find it anywhere for near its original price (I saw one on eBay for £250, double its original ...
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1 vote
0 answers
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best lithium ion secondary battery (3A, 3V)

Are there any reasonably priced standard lithium ion batteries that comes closest to: either 3A (discharge limit) and 3 volts (x16 batteries). or 4A (discharge limit) and 4 volts (x12 batteries). They ...
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  • 111
2 votes
1 answer
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How to make a battery powered device work direct on power

I have an audio device that works with battery, but this little friend here stopped working,in fact it still works, but apparently it is sending a lot less energy than it should, nor being able to ...
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1 vote
1 answer
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Laptop Series Battery Compatability

I need to replace my Toshiba Satellite L655-13X battery with a new one. The batteries I found are for L655-S5083, and L655-S5150. They appear to be the same in the picture to my battery. However, how ...
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1 vote
1 answer
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Processor and battery relations

I would like to buy a new laptop, and this issue appeared: If there is a notebook with 1.4 ghz proc, and there is an another with 2.6 ghz from the same serial, how this parameters related to the ...
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1 vote
0 answers
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Lead acid (PbA) charger and fuel gauge

I want a charger and SoC determiner ic/with example (sample) circuit or a product for a Lead acid (PbA) battery 12V/65Ah. Which can send the SoC through a I2C port to my microcontroller (Raspberry Pi)....
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What's bond between laptop battery cell quantity and mah? I need the highest possible capacity battery for Acer Aspire 7745G

I'm looking for battery for my laptop Acer Aspire 7745G. I need the largest possible capacity and for me it doesn't matter how heavy it is. As I read in Acer website, more cells means higher weight ...
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1 vote
1 answer
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Are there laptops with extremely high battery capacity?

I noticed that most laptops have batteries that have under 100 Wh of battery capacity. Usually this is fine and can last for hours if you aren't pushing the machine too hard, but I'm wondering if ...
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-1 votes
2 answers
18 views

What should I care about when buying a new battery pack for a laptop?

I need to buy a new battery. The model of the battery is Li-Ion Battery Pack A41-K53. Rating = 14.4v 2600mAh, 37Wh. I searched and found the same model, but voltage and mAh is different. The voltage ...
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0 votes
0 answers
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Where to find a reliable laptop battery replacement for ASUS K42N Series?

I bought a battery from an e-commerce site with about 30 reviews from previous buyers, but I am worried if it might explode because it may not be the original battery provided by ASUS. I just bought ...
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How to supply jetson tx2 with dji matrice 100 battery?

I want to put my jetson tx2 dev kit on the drone but i don't know how to supply the jetson using drone's battery. I think i need a dc/dc regulator (converter) cause the jetson require at most 19.6V, ...
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2 votes
1 answer
26 views

Changeable cell phone battery pack

I sometimes need 10kmah and sometimes 20kmah and would prefer not buy 2 separate battery packs. Money is no object. Is there a cell phone USB charger that is chainable?
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4 votes
1 answer
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Raspbery Pi case with Real Time Clock and battery power

I have found a few old Kickstart projects, such as this, which consist of a case (not on-topic), containing a Real Time Clock and battery power for the Pi. Some have a few extra features, such as a ...
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