yacpi, acpitool

[Gerard Robin <g.robin3@free.fr>]

Hello,
when I run yacpi I get: 

AC: off

BAT1 Capacity [|||||||||                ] 37%

Battery BAT1: discharging

Remaining time: 00:32 h

cpu frequency: 800/1600 MHz

cpu governor: userspace

Temperature: 31 degrees C

when I run acpitool I get:

 Battery #1     : discharging, 37.01%, 01:03:20
 AC adapter     : off-line
 Thermal zone 1 : ok, 31 C

both agreed about discharging and temperature but the remaining time
given by acpitool is twice as much as the remaining time given by yacpi.

What is the meaning of these remaining times ?

tia
--
Gérard