Sunday, July 11, 2010

Proper Care of Lithium Ion Based Battery (DO NOT FULLY DISCHARGE YOUR BATTERIES)

I am sick and tired from people (especially girls) tending to discharge their battery fully and not recharge it.. often creating the ‘aiya.. phone no more battery’ issue..

Against popular belief.. and I do not know why hand phone shop owners or workers still advice people to do so, is to use the phone until the battery is almost dry (out of battery).. before recharging it.

This is true for nickel and lead based electronic gadgets, and almost all the older generation of mobile phones.. but did you notice, that ALL modern mobile / cellular phones DO NOT USE nickel or lead based batteries? But rather use Lithium Ion batteries. Don’t believe me? remove your battery and look at it.. it is written there LITHIUM ION BATTERY.

So what is it so special about Lithium Ion Batteries and what on earth am I talking about? basically, to sum it up.. here’s a small comparison..

Nickel / Lead Based Batteries

- Have a problem known as ‘memory effect’, in which it is advisable to use it until it is almost fully discharged before charging it up. This is actually HEALTY for your battery.

Lithium Ion Batteries

-Do not fully discharge the battery as it is unhealthy for the battery. By doing so you are actually reducing the life of the battery.

Why? Here’s some ‘copy and paste’ from articles on the internet which I have compiled.


1. Source:

“A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges.

Although lithium-ion is memory-free in terms of performance deterioration, batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem. Letting the battery run down to the cut-off point in the equipment will do this. If ignored, the fuel gauge will become increasingly less accurate. (Read more in 'Choosing the right battery for portable computing', Part Two.)”

2. Source:

“Depletion below the low-voltage threshold (2.4 to 2.8 V/cell, depending on chemistry) results in an unrecoverable dead battery because the protection circuit disables charging with a standard charger.[71]

3. Source:

“Modern Li-ion batteries love to be charged often. They don't like being fully discharged. This is completely opposite from older style batteries.

Li-ion batteries prefer frequent and shallow discharges. If you do that you'll get far more total energy out of them.

I don't know the exact numbers, but you'll get about four times as many charge cycles out of them if you only use 50% of the charge each time, and twenty times as many cycles if you only use 25% of the charge each time.”

4. Source:

“Charge often.  Don't try to fully discharge the battery packs frequently. This only adds strain.  Several partial discharges (regular use) with frequent recharges are better for lithium-ion than one total discharge.”

5. Source:

“Tip #2: Avoid allowing your device to discharge completely
Every wondered why your modern phone, PDA or iPod is able to cheerfully tell you that “Your battery is now exhausted” for several seconds on its brightly-lid LCD screen before switching off? The reason is simple; there is an artificial circuit that shuts off the device when the charge in the battery is too low.

This extraneous circuit is built to protect from the damage that could result if the charge of your lithium ion battery falls too low. If you still don’t get it: if the charge of your lithium ion battery falls too low, the battery can get irreversibly and permanently damaged. So since Lithium Ion has no “memory effect”, it is better to simply charge your portable device as and when you can or remember.

To set your mind at ease, a “charge cycle” means a single iteration of depleting followed by a re-charge until 100% of battery charge. If you consume 50% of your iPod’s battery on day 1, recharge to 100% at night, and do the same thing on day 2, then you would have just finished up one charge cycle of its battery life.

Hence constantly recharging a lithium ion battery does not shorten the battery life more than normal usage would. Avoid letting it sit on empty for too long; instead, keep it charged-up if you can.”



 nokia-li-ion-battery.jpeg EN-EL9 Rechargeable Li-ion Battery 25353

I hope I have made my point.. so guys.. if u are reading this.. please.. go ahead and charge ur phone.. so u will have a fully charged phone with you every morning.. and ample batt life just incase u need to call the police or someone for emergency.. this is for your safety as well.

No comments:

Post a Comment