Root Unable to flash RUU "low battery error"

[ggkumar]

i have flashed Jellyfire bean(JFB) 4.2.2 on my htc desire s. It was Fallout_Evolution_V5.0 on my device before i flashed with JFB 4.2.2. Battery life and performance was good with Fallout_Evolution_V5.0 and damn worst with JFB 4.2.2. i fed up with all these ROMS and decided to go back to my original RUU ICS. so I have downloaded the RUU ICS(RUU_SAGA_ICS_35_S_HTC_etc etc zip) from HTC DEV site and started flashing my device using HTC SYNC SHIELD. After 50% of process suddenly power went off resulting in jerky shut down of my computer(no ups). After one hour i tried flashing it again and getting an error message stating that (LOW BATTERY) "battery level is below 30% please recharge and try flashing". i struck up here in the REVOLUTIONARY HBOOT screen (Vol down + Power). when i try to switch it on normally it is showing HTC witha vibrate and then blank screen with lights on. same with REVOLUTIONARY HBOOT WHITE SCREEN, when i go into recovery mode it is showing blank screen with lights on.

please help me how to charge my battery?? or any alternative to flash my mobile..

DEVICE : HTC DESIRE S
ROOTED
REVOLUTIONARY S OFF
HBOOT 6.98.1002