is it dangerous to let the phone drain battery down to 0?

[pete101]

The issue i have is some factory in Vietnam which produces samsung phones ships them with 0% charge meaning while it is sitting in the warehouse at amazon (mine was manufactured in dec 2015) it naturally switches off and inable to turn on without plugging in charger. How much long term damage would have been caused to the (non-removable) battery if the protection circuit has already put the battery into sleep mode cos it fell below 0%?

This is my 4th replacement phone. The 1st one had same issue came with 0% and had been made 3 months before. The next 2 were ok (diff factory charged to 60% upon shipping) and this 1 came from same original factory. I could tell by the imei sticker on the box cos their attached differently.

Im just concerner about the damage caused. Leaving it to drop to 0 and switch off then charge next day is not gona do much damage but if it's been sitting in a warehouse for months at less than 0 i.e. switched off how much damage will there be?

 

[nahoku]

The only danger I've seen on this forum is that there have been more than a lot of posts where the OS corrupted due to the phone dying because of the battery being totally discharged. Now, if you don't consider that dangerous, then by all means, continue as you are.

 

[B. Diddy]

If a lithium battery reaches true 0%, then it's irreversibly discharged and you can't recharge it. The 0% that the phone reads is purposely not true 0% -- the phone will automatically shut down before the battery is completely drained in order to protect it. So it's true that if you drain the battery to 0% as the phone reports it, you won't damage the battery immediately. But if you make a habit of this, you will see the battery life deteriorate more quickly than if you regularly start recharging around 20-30%. Considering that most batteries are not user-removable, it's a good idea to avoid regular deep discharges.