Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [lithium]

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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What is the truth about 1.5 V "lithium" cells?

At least one manufacturer out there is marketing "Lithium" cells in familiar AA and AAA sizes, as direct replacements for those standard 1.5 V sizes, boasting the typically better than alkaline longevity you'd expect from lithium. But we all know…
Randy
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Pulse-powering heavy loads with a coin cell

Lithium coin cells are rated for fairly low standard current draws, on the order of 1 to 5 mA. Also, while they allow greater pulsed current draws (i.e., periodic bursts), this appears to be detrimental to cell capacity (and also can cause a drop in…
boardbite
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Why are lithium ion cells mostly round?

After watching some tear-down videos on YouTube with various lithium battery products (portable chargers, laptop battery, power tools) they all (apart from mobile phones / tablet battery) seem to feature cylindrical battery cells. Is there a…
user27511
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Wouldn't charging a lithium battery to 80% only defeat the purpose of putting the battery into longer use in the first place?

I see most smart devices (laptops/tablets/phones) now have the option to optimize your battery by charging it to 80% only. But wouldn't this reduce your capacity i.e. your brand new battery now only has 80% of its rated capacity, which means more…
GuitlyofNtAsking
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Boosting a Lithium Coin Cell

I made a board recently and just started checking it out yesterday. I used a typical lithium coin cell and a boost converter (Microchip MCP1640). With a battery plugged in I get no voltage out of the boost converter (i.e. 5V to GND measures 0V).…
vicatcu
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If a lithium cell is said to have a capacity of 20 Ah, does that mean all 20 Ah can be used?

Toshiba's SCiB 20 Ah Lithium titanate cell is said to have a nominal capacity of 20 Ah. The cutoff voltages are 1.5 V and 2.7 V. Does this mean that all 20 Ah of charge exist between those two cutoff voltages? Otherwise to get all 20 Ah of charge…
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How much lithium in lithium polymer batteries?

This document summarizes aircraft travel guidelines for batteries: http://safetravel.dot.gov/documents/airline_passengers_and_batteries.pdf It has two categories of lithium batteries: 8 grams or "equivalent lithium content" per battery 8-25 grams…
Mark Harrison
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Lithium-ion rechargeable battery, shelf life

For Lithium-ion rechargeable batteries, that have never been charged, or been charged like 2-3 times at most, some 2-3 years back, and having since-then been in packaged condition, what should I expect their condition to be ? Reading this wiki…
bdutta74
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What is the effect on lithium ion batteries from long term storage in sub-freezing temperatures?

I am designing an off-grid power system for a mountain cabin that is not used in the winter. The ambient temperature can get as low as -20deg F (-29deg C) during the winter. Due to snow and other environmental factors the system will be totally…
Paul Rygaard
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How do current spikes over limit affect Lithium battery life?

In one of my application, I am using Tadiran Lithium Thionyl Chloride Batteries MODEL TL-5934. In the data sheet , the max pulse current shows 50mA. However, in my application, we have low duty cycle current spikes up to 70mA. Our battery are…
seanyu24
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How can I safely charge 3 lithium 18650 batteries to use in one pack?

I'm working on a project to make my own super-bright bike taillight using an emergency flasher LED (something like this:) The LED package requires a 12V input, but from what I've read from other people who've done this before, it will still work…
nhinkle
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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 the mobile application after a few days the battery…
Viral Embedded
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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 charging a Li-Ion and you have to have a lithium…
user3689010
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Lithium Button Cell Characteristics

I am working on a small wireless sensor platform and trying to figure out power supply options. My power budget is approximately: .2mA constant, ~15mA for .1s every 2-3s, and 60mA for 10s very intermittently (once or twice per hour). This works…
John Laxson
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Is it safe to have 4V continuously supplied to a lithium battery?

I have a compact digital photo camera that will be on for very long periods(for a time-lapse video). It is powered by a Lithium-Ion 3,7V, 720mAh battery I want to supply 4V to the battery terminals, while the battery is in the digital camera. This…
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