Magnets and Li Batteries

[mckeowngoo]

Is there an actual harmful effect on a Li battery caused by the magnet in a leather case?

I have a leather case for my Z1 and I want to use it but I won't use it if the magnet in the lock is going to knacker the non removable battery.

Sent using my Z1 & Tapatalk 2 and not that abortion of a XDA premium app that I paid for and now shames the community it serves.....

 

[Wiltron]

The active ingredients in a Li-Ion battery are Lithium and Carbon. Lithium itself is an alkali metal, and is not magnetic, therefor adding a magnetic charge to it will not do anything. The Carbon inside a Li-Ion battery is Propylene carbonate, which is an organic carbon mixture, and is classified under low grade magnetic field. This means that any consumer grade magnet won't affect it.

If you're near high powered chemical magnets or industrial applications of magnets for scientific testing, then you may have an issue, however most laboratories don't allow electronic devices inside a controlled environment.

Any Neodymium magnet you throw at your phone, those are the silver, powerful "rare earth" magnets, or lesser powerful magnet found in most fridge magnets and wallets/cases, won't affect your phone in a negative way.

Source: I'm a scientist.

 

[eclyptos]

Source: I'm a scientist.

I am glad the source is reliable but the phone it self contains metal parts and use magnets around can influence the phone reception and even if this is not harmful to my phone I will avoid magnetic contact anyway.

 

[Wiltron]

I am glad the source is reliable but the phone it self contains metal parts and use magnets around can influence the phone reception and even if this is not harmful to my phone I will avoid magnetic contact anyway.

His question was about the battery.. not the other parts of the phone.

Even still, the phone is magnetically shielded.

Unless you're around extremely powerful magnets, such as working in science labs and/or electromagnets in junk yards, you don't need to worry about the tiny extremely weak magnet in the case.

 

[eclyptos]

His question was about the battery.. not the other parts of the phone.

It not make difference.

Unless you're around extremely powerful magnets, such as working in science labs and/or electromagnets in junk yards, you don't need to worry about the tiny extremely weak magnet in the case.

What about LCD? I got bad experience with a small magnet, it can damage the screen.

 

[Wiltron]

What about LCD? I got bad experience with a small magnet, it can damage the screen.

Again.. he is not asking about the LCD.. he is asking about the Battery.

LCD screens are not affected by any source of magnetism either. If they were then cases like these wouldn't be on the market.

Things like these also wouldn't be backed by large companies or be so successful:

http://www.niteize.com/product/Steelie-Car-Mount-Kit.asp
https://www.kickstarter.com/projects/studioproper/wallee-m-modular-magnetic-phone-mounting-system

Lets not forget that the phone itself has a magnet on the side of the device and a smaller magnet on the cable for the magnetic charging port. If you know anything about physics you'll know a current runs through the USB cable when it's charging the phone, which also doesn't affect it.

Holding a magnet up to an unshielded SnapDragon or whatever, or the mainboard, then yes, but these phones have aluminium shielding.

 

[turboxchaz]

I don't really mean to revive an old thread, but I'm about to attach some rare earth magnets to my ravpower QI charger with an external battery. I'm assuming my external battery is lithium-ion based. I want to spread out the magnets so my phone can properly attach to it, but I wanted to make sure everything is fine first.

I googled another forum that explained that using magnets with lithium ion cells can potentially cause a dead-short.

"side impact will cause magnet to shift and possibly bridge to ground causing a dead short. a very bad thing to do with a li-ion cell. this could lead to venting with flames!"