Battery loss stats (Post your runtime here)

Hi,

The 9400 / e1705 laptops seem to all have battery replace warnings after a year so I thought we help ourselves and take a look at the battery power loss / year for dell laptop batteries.

Basically post here with the following three stats:

Laptop model:

Battery model:
Number of cells:
mAh Rating:

Battery-runtime when new: This will be the benchmark time
Battery-runtime now: Try and use the same test method (screen brightness etc) when new

Percentage still left: (calculated by runtime now / runtime before)
Percentage loss: (100% - the above)
Average Runtime loss / year: (a per year loss in minutes)
Average Percentage loss / year: (a per year loss in % of original capacity)

So let me start off with mine:


Laptop model: Inspiron 9400 / e1705

Battery model: TYPE U4873
Number of cells: 9
mAh Rating: 7200

Battery-runtime when new: 140 min (2:20 hrs)
Battery-runtime now: 95 min (1:35 hrs)

Percentage still left: 68%
Percentage loss: 32%
Average Runtime loss / year: 45 min
Average Percentage loss / year: 32%

Estimated time until less than 50% capacity: Less than 2 years