Any ClipZip (Rockbox) users? (Battery doubt)

[M462]

Hi  , on December I bought a new ClipZip to replace my Clip+ (1 year old xd) cause I got an stupid error when attempting to connect it to PC xDD. Chance for an "Upgrade".
I tested the battery fully charged on both (same headphones, mp3 files, volume, eq, minimal brightness, screen time, etc.).


.:: RESULTS ::.

* Rockbox (3.13):

-Clip+: 12hrs30min

-ClipZip: 8hrs30min


* Original Firmware:

-Clip+: 9hrs.=58% || 10hrs.=55% || 11hrs.=53% || 12hrs.=48% || 13hrs.=45% from here the battery was drained in about 1hr. Total = 14hrs.

-ClipZip: 9hrs.=44% || 10hrs.= 33% from here the battery was drained in about 20min. Total = 10hrs20min



Well, for me this  "4 hrs" less are equal to 2 days less of playback (I use it 2 hrs per day) :c
So, my question is: This is normal on ClipZip? Considering that Sandisk offers almost 15hrs of playback for both players, I know I'll never get 15hrs, but at least 12hrs like Clip+ running Rockbox.

Thanks !

[saratoga]

Looks pretty low for the clip+:  http://www.rockbox.org/wiki/SansaRuntime

[M462]

Looks pretty low for the clip+:  http://www.rockbox.org/wiki/SansaRuntime

It could be worst, at least aren't 10 hours xdddd
I can live perfectly with 12hrs. , (recharged once per week.) But no with 8hrs. I'm thinking seriously on a downgrade  :'( (Sadly).

But I still wanna know if the battery of all Zips sucks, or is just this one (bad luck)