Question about battery running flat on JB iphone

[Rivers]

I have a 3.1.2 Jailbroken iPhone (blackra1n) and was wondering if I would lose all my data if my iphone battery went dead flat?

Thanks.

[blkcadi]

Welcome to MMi,
Nope, you will be fine.

[Rivers]

Wow, thanks. I was half expecting that I would probably lose data.

[davesnothere11]

Although you don't lose data it's bad for
your battery to run it out completely.

[Rivers]

hmm why's that? I wanted to a full dis-charge of the battery before charging it fully again.

[davesnothere11]

This is what wikipedia says:

Lithium-ion batteries should never be depleted below their minimum voltage (2.4 to 2.8 V/cell, depending on chemistry). If a lithium-ion battery is stored with too low a charge, there is a risk that the charge will drop below the low-voltage threshold, resulting in an unrecoverable dead battery.[citation needed] Usually this does not instantly damage the battery itself but a charger or device which uses that battery will refuse to charge a dead battery. The battery appears to be dead or not existent because the protection circuit disables further discharging and there is zero voltage on the battery terminals.