03-16-2012 05:52 AM
Hi there, I recently bought a ThinkPad x220 with a 9-cell battery, thinking that it would help me get through the day without a charger. However, it seems like the battery is quickly deteriorating. It's been around a month since I purchased it, and the battery stat shows it's had 18 cycles of charge and discharge. I've made sure to never drain the battery down to 25%. The capacity is reported to be at 97.4% of design capacity! Another laptop I had from Dell only dropped down to similar figures after a year. Should I be worried? Is there anything I can do to mitigate? Or is this battery flawed in its production?
Answers would be greatly appreciated.
03-16-2012 06:56 AM
Hi nzguy, and welcome to the Lenovo User Community!
What you're seeing is normal for a lithium-ion battery. In normal use it's going to last 2-3 years.
Hope this helps explain!
03-16-2012 11:13 AM - edited 03-16-2012 11:17 AM
For reference, my X220 slice battery is down from 65WHrs to 57Whrs after 134 cycles. 12% off, but it took a few months.
Come to think of it, yeah, that is some unfortunately quick aging, but in practice laptop batteries only really last one year--that's the length of the factory warranty. Three years? The graph in bananaman's link seems to imply that after three years, the battery will hold no charge at all.
03-17-2012 03:51 AM
03-17-2012 03:08 PM
I'm running X220 I7 processor and 8GB memory with 9-cell battery and at least once a month, I run the battery down until it auto "shutsdown" at about the 10 percent battery mark. This was/is a recommendation by IBM engineers and now Lenovo. I have run my X-series laptops using this process have had no battery problems. My X220 battery is a Sanyo with first use July 2011, battery life had not declined. I can use in presentations for a full day of work without the charger.