Questions tagged [battery]

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Yuasa as battery replacement for APC Battery

I am not familiar with UPS battery but we have a SMT SmartUPS 1500 with battery that needs replacement. We went into a vendor asking for the RCB7 but instead provided with a Yuasa VRLA Battery 12V ...
typicalguy's user avatar
0 votes
1 answer
16 views

Battery replacement specifications

My battery is dead and I would like to replace but cant find the same exactly battery on the market. Laptop: HP omen 15-dc1001nv Battery: SR04XL 15.4V --- 70.07Wh (Nom: 4550mAh) I have ...
Mpizos Dimitris's user avatar
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Smartphone with LiFe PO4 batteries?

I've been reading about child slave labour in the cobalt mines and do not want to have anything to do with cobalt. I don't mind having a smartphone with less than half the battery life if it means I'm ...
SeanJ's user avatar
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1 vote
0 answers
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What battery should I choose? [closed]

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'...
Arunima's user avatar
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3 votes
1 answer
109 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 voltage monitor by adding two resistors to accomplish basically what ...
Jack's user avatar
  • 131
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1 answer
69 views

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. ...
Franva's user avatar
  • 125
1 vote
1 answer
21 views

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 ...
paul's user avatar
  • 111
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0 answers
80 views

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 ...
amra's user avatar
  • 111
1 vote
2 answers
40 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 ...
Bill Bell's user avatar
  • 123
1 vote
1 answer
30 views

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 ...
Reza Hosseinzadeh's user avatar
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1 answer
23 views

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 ...
RocketNuts's user avatar
1 vote
3 answers
6k 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.
inquisitive-mouse's user avatar
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2 answers
44 views

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 ...
Jachdich's user avatar
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1 vote
0 answers
19 views

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 ...
X Builder's user avatar
  • 111
2 votes
1 answer
19 views

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 ...
Neo son's user avatar
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1 vote
1 answer
16 views

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 ...
joker's user avatar
  • 111
1 vote
1 answer
54 views

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 ...
Peter's user avatar
  • 113
1 vote
0 answers
17 views

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)....
Animesh Sahu's user avatar
1 vote
0 answers
15 views

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 ...
Pranciskus's user avatar
1 vote
1 answer
80 views

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 ...
Aaron Franke's user avatar
-1 votes
2 answers
23 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 ...
Tolga 's user avatar
1 vote
0 answers
11 views

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 ...
Pherdindy's user avatar
  • 241
1 vote
0 answers
61 views

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, ...
Paolo Milini's user avatar
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?
William's user avatar
  • 119
4 votes
1 answer
45 views

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 ...
Mawg says reinstate Monica's user avatar