Lithium batteries are disposable/non-rechargeable batteries, often found in button/coin-cell form and sometimes in cylindrical cell form. Lithium batteries are used in portable consumer electronic devices, including watches, cameras, calculators, thermometers, etc.

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How to increase lithium batteries life for storage [duplicate]

Currently i sell some types of lithium batteries 3.7V, including phones and 18650 format. By factory they come with little charge or half charged, they are new and 0 cycles. Due high quantity they are ...
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51 views

Lithium charge module on NiMh batteries

Can I use a lithium charge module on NiMh batteries? The charge module has 2 led, one for charging and one for full that I would really like to use with my NiMh batteries.
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46 views

Li-ion battery maximum discharge current testing

I been playing a lot with Li-ion batteries (NCR18650Bs to be exact) and I have a question regarding how to test their maximum capabilities and generate my own conclusions. If you take a look at this ...
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73 views

Measuring state of charge of a non rechargeable CR123A lithium battery

Is there a method (voltage, resistance, other...) of measuring leftover charge in a non rechargeable lithium battery? Background: I'm trying to get a general overview of power consumption for few ...
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47 views

Is there a safe way to run a camera on a Lithium ion AND external power at the same time? [closed]

Similar, but not quite the same to this Question; "Charging and Using a Li-Po battery simultaneously", I want to have a battery in my camera but also connect an external charger at the same time. Is ...
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208 views

Lithium coin cell battery showing randomness in voltage

I have a CR2032 coin cell battery and using that I am operating a BLE 4.1 module. When I connect a fresh battery in to the module the voltage shows 3.3 V, and after continuous communication with ...
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104 views

About 18650 batteries possible accidents with reversed polarity

We all know that lithium batteries are dangerous and can blow up if we use them the wrong way. My doubt is, if I accidentally place them in the following sequence in series (Pay attention to the ...
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48 views

TP4056 - Increasing charging current

I am designing a Lithium Ion charging circuit that will be using the TP4056. Currently, the peak current is 1A, and I would like to increase the charge current in order to complete the charge faster. ...
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3answers
95 views

What type of Lithium batteries work best for my project [closed]

I have a scooter with 48v/1000w motor, now I am trying desperately to find a lighter lithium battery but I'm constantly told it will be an impossibly expensive endeavour since lithium is very costly, ...
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2answers
64 views

Changing battery from 12v SLA to 12v Lithium, how can i accomplish this setup?

I am thinking of more speed for a kick scooter project. I have a 800w hub motor for this scooter but at only 40Km/h i am thinking of making it go faster. Now I know that increasing the voltage from 48 ...
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1answer
47 views

Hazards of charging an opened circuitry lithium-ion battery?

I was opening a Toshiba Excite 7 tablet which stopped charging. Tablet turns on without issues when battery is not connected, but does not when it is present. I decided to check the little pcb ...
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1answer
188 views

How many battery cells in a smartphone?

Are most batteries built into smartphones (e.g. iPhone) single cell batteries? If so, why might that be?
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32 views

DIY Battery for 12V screen

Im thinking of building a raspberry pi laptop. I found a screen that runs on 12v 2 amp power and I wanted to make a battery out of 8 3.7v 3400mah 18650 LiIon batteries in parallel then series to make ...
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93 views

Charge Li-Po battery with TP4056? (Or what else?)

I bought a single cell Li-Po battery and two different charger modules (one without protective circuit and one with protective circuit) from AliExpress. The Li-Po battery has a protection circuit ...
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1answer
75 views

High temperature battery chemistries

I'm currently developing a solar powered data logger that sits outside in direct sunlight for a good chunk of its life. Preliminary testing has shown that the inside of the enclosure can get up to 70°...
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1answer
48 views

Trying to combine two power source into a single micro usb output

I had a power bank which is has 2 usb port that can charge simultaneously, the problem is both of it discharge at 5.1v and 0.5a. I would like to use 2 usb plug combined them in parallel into a single ...
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1answer
82 views

Charging batteries while powering device

This may be somewhat of a common question although there are some specific challenges in this one. I have a bluetooth speaker which no longer charges its internal Li-ion cell. Using a new cell I can ...
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1answer
115 views

Are Lithium Thionyl Chloride Battery usable in my vibrating environment? Are they safe?

I have to power a circuit subject to constant vibrations (10-15 Hz with an amplitude of ca 10 millimiters) with a battery and I was thinking of a Lithium Thionyl Chloride Battery. The circuit has to ...
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1answer
66 views

Specifications for a charger needed to charge LiFePo4

I have a project with three 4-Cell LiFePo4 batteries. The battery specs: 4S at 3.3V 4200mah 30C I want to charge all 3 batteries in a range of 45 - 75 min (Preferably one hour) What are the ...
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2answers
52 views

battery management protection component

I have been looking at a lot of Battery management system/protection circuits lately and there are components that I can't identify. Can anyone tell what is the name and function of the component I ...
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3answers
79 views

Lithium batteries cycle life

We as a group have been trying to write an academic essay about advantages of lithium batteries. We have made some research about lithium batteries and found that lithium batteries have high cycle ...
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2answers
313 views

protection circuit Lithium-ion batteries

I am designing a lithium-ion battery in my project but I am a little confused in regards to certain aspects of the protection circuit of lithium-ion batteries.I know about the different stages of ...
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1answer
114 views

Charging board for 3 battery 3.6V used for supply an Arduino board

I would like to build an autonomous system that contains: - An Arduino board (later, it will be just the chip) - A LED strip I decided to use 3x3.6V lithium batteries in series. So, the idea is to ...
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1answer
108 views

How to power small solenoid with a 3.7V lithium battery pack

I've got a small 1.5V 2W pull-type spring-loaded solenoid I'm trying to fire with a 3.7V (45mAh at 1C) lithium pack for about 0.5 sec. I am able to get it to work using a (1.5A max) voltage source at ...
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1answer
93 views

battery chargers - AGM and lithium

I am working on an inverter with a battery charger for a 24V,200AH AGM battery pack. The battery charger current can be adjusted from 10 to 50 amps. Now, I want to be able to also a charge a lithium ...
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1answer
54 views

Protection from AAA Lithium Battery

I am working on a system that uses a AAA alkaline battery but I am concerned that AAA lithium batteries that run at 3.7V exist (Amazon link). Can anyone suggest simple circuits that have a low leakage ...
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1answer
128 views

PWM lithium-ion charger

I want to make a custom lithium-ion 18650 standard cell charger as I will be charging 100s of them (recycling old laptop batteries). Base on my research, lithium-ion cells use constant-current, ...
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2answers
90 views

Battery simulator

I wanted to make battery simulator, used to test li ion charger, and i have the schematic of the one that i use at work. I turn the knob and adjust the voltage at P1 and i can measure sink current at ...
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2answers
106 views

wire gauge for solderless lithium batteries in series?

I am making a prototype lithium battery of 2kw / 40 amps. it's 8p14s, and every bank of 8 parallel is joined with copper sheet in solderless contacts. I have bought some 0.1mm thick copper sheet and ...
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1answer
452 views

What is this Externally-Triggered Fuse?

In the datasheet for an overvoltage protector (TI BQ771815) there is a device I don't recognize: It is used in the datasheet as a fuse which can be opened by an external signal from the overvoltage ...
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1answer
263 views

charging circuit for series coin batteries

I am designing a circuit that will be powered by two rechargable coin cells in series, and I need to include a module to recharge them in-situ. I have had a look on RS at the range of rechargable ...
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1answer
354 views

How to design a Lithium-Ion battery pack?

I have a project that I am working on that requires the use of a rechargeable battery pack. The major issue I have is that the battery pack needs to be as slim as possible. So far all I could find are ...
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811 views

How to charge lithium-titanate battery with lower voltage

I would like to charge a lithium-titanate battery rated at 2.4V (capacity 50mah, max charge voltage 2.75V), which is lower than the typical li-ion battery (3.7/4.2V). Most charger ics seem to be ...
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345 views

lithium polymer battery connections

I'm trying to replace my tablet li po batteries and am trying to understand the connections. The following figure shows the 2 3.7v batteries connected in series. Most replacement batteries I've seen ...
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2answers
350 views

Lithium Battery Charger IC - Charging and Power

Basically, for the circuit I'm making, I need it to be powered by a Lithium battery. Also, this Lithium battery has to be able to be charged via USB. I have seen external chargers for doing so, ...
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1answer
272 views

Using LM2577 boost converter to charge the 2S lithium ion battery with an input of 15W at 5V

I am trying to design a Lithium ion battery charger that can charge a 2S battery. The input power will be 15W at 5V. I am thinking of using LM2577 boost converter to efficiently step the input up to ...
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1answer
129 views

280LM Led Headlamp needs FCC certificate?

Do I need FCC certification for my 280LM Led Headlamp with 1800MAH Lithium battery which is rechargeable only via USB? More details: Watts out: 3W Lithium-ion Cells: 103450 Energy Content:1800Mah ...
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1answer
229 views

Help with high current single cell lithium charging

I am designing a system to charge a single cell lithium battery. It requires pass-through, path-selection, over and under voltage protection. The bottom line is this system needs to power a device ...
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2answers
213 views

Options for 12v battery pack with charger

I have an amp that requires 12-20v dc power. I'm looking into a solution for a portable battery pack that I can charge while running the amp as well with discharge and overcharge protection. This is ...
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1answer
160 views

Are there any high energy density (i.e. zinc-air or lithium-manganese dioxide) batteries without high internal resistance?

For my wild life camera, I want a small cell that can provide 0.5W for 8 hours or more. It doesn't seems rechargeable lithium ion batteries have that energy density. I don't mind if the cell is non-...
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1answer
160 views

Why are the charge and discharge rate of Lihium Polymer Batteries different?

I have a 3S 1.3MAH Lithium Polymer battery with a 25C discharge rate, and a 5C charge rate.From what i know, the discharge rate is the rate at which the battery can be safely ischarged( i.e how many ...
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2answers
249 views

Safe Lithium Battery Management

I'm building a device that needs to run from Lithium batteries. I am well aware they need to be charged/dis-charged properly to avoid damage and explosions. To my knowledge a charging system has ...
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2answers
114 views

Can I swap any two lithium cells on an MP3 player / camera, etc?

Lithium batteries commonly have +/- and temp monitor connections. I'm pretty sure I can swap a 290 mAh MP3 battery with a 1400 mAh battery, it will charge very slowly. Can I swap the temp sensor ...
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1answer
237 views

Difference between Lithium Polymer batteries of varying capacity and cell amount

I was looking to purchase a LiPo batteries online for a side project. Upon shopping around, and reading up on LiPo batteries, I have a fair understanding on what the numbers/letters on the battery ...
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0answers
144 views

Li-SoCl2 battery state of charge

I'm developing a data logger powered by Li-SoCl2 (http://www.100y.com.tw/pdf_file/02-SAFT-LS33600.pdf) battery and I have no idea on how to overcome the problem of estimating the residual charge of ...
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2answers
150 views

nexus 7 battery repurposing [closed]

I have just broken my nexus 7 and I was about to salvage the battery. I was thinking of using it maybe to power my raspi or arduino. My main question is how do I charge it? I was thinking of cutting ...
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195 views

What Lithium chemistry in phones' (now) 3.8V batteries?

I'm specifically looking for the discharge tolerances...can communicate with the charge controller on the phone and want to increase the discharge depth from 3.5V to say 3.1-3V for longer battery life....
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1answer
466 views

What do B+ and C+ mean on the wires of a Lifepo4 battery pack?

I bought this Lifepo4 battery pack. It came with its own charger. The seller told me the charger can be connected directly to the battery. There are 4 cables coming out of the battery: C+, C-, B+ and ...
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2answers
753 views

Confusion regarding the design of Lithium Ion PCB

From this site and many others, it seems to be universally recommended that a lithium ion battery not be discharged lower than 3.0 volts. Most actually recommend to stop discharging at around 3.3 ...
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1answer
4k views

Why do batteries leak/explode, and how can I prevent it? [closed]

I've been the owner of many-a-battery which blew up, particularly inside of flashlights. I've recently purchased a fairly-decent-quality flashlight, and I'd greatly like to prevent the battery from ...