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iRiver H100/H300: Battery drain while off.

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Skyly:
Someone mentioned short-circuiting something when they were using a screwdriver to disassemble their iriver. Later they discovered that this hadn't happened at all, but I'm wondering if I have done something similar.

Notice that farwest and I have both had this problem after changing the battery.. so it's possible. Since the original battery was already struggling to last for 1 hour, I don't know if this problem did or didn't exist before I started unscrewing things.


Hmm. One thing I can test is the battery brand, since I still have the original iriver battery. I can swap that back in and I will at least be able to test drain while the player is off.
If the player doesn't drain, we know it's the CameronSino batteries, possibly mixing badly with only some irivers. (Yes, unlikely)
If the player does drain, we know it's the lump of black plastic itself.

I will also test HDD issues while charging as well... but no idea when I'll get around to doing this. Switching batteries isn't fun, and impatience = breaking parts.

But really, it looks like the battery is simply losing charge as a permanent action. As if it's always losing X volts per hour, and turning the player on simply adds to that a bit. From what I've seen, I could go so far as to say that the amount of charge used per hour to play and load music endlessly is less than the amount of charge lost per hour when it is simply switched off.


Oh, one other thing maybe worth mentioning. I live in Spain. This is a UK H340. I use the UK AC adaptor with a plug converter to charge, and sometimes even an Australian AC adaptor. I'm from Australia and some little $"#@! stole my first H340, so I still have the charger. Australia uses 240volts, unlike America but similar to Europe.

petur:
fyi, I also live in Europe and have the Euro model. I'm now at my 3rd battery, which is also CameronSino (the previous was some cheap ipod replacement brand that almost blew up).

I cannot see anything you're seeing

putting back the old battery is a good idea, and yes I know that doing that is a serious PITA

dreamlayers:
Someone should measure current used by the device when it is off.   That will allow you to see if it's the battery self-discharging or the device using power. You can probably get a multimeter for less than the price of ordering a new battery.

rocknorb:
Hello everybody,

my 4 year old h340 is draining the battery in off-state too, and it does not show the "charging screen" when the power supply is plugged in.

I opened my player, disconnected the red plus wire from the battery and put in an Amperemeter. It showed 20,4 mA whilst player is OFF. So the battery is discharged by 0,576 Ah in 24 hours, therefor a good 1600mAh battery will be empty after 3 days, an old battery will surely be discharged way before that.

I suspect the LX2201 (www.rockbox.org/twiki/bin/view/Main/IriverH3XXHardwareComponents#Microsemi_LX2201_USB_AC_battery) chip being defective. I supplied 4 Volts to the battery plug on the pcb and on the Vdd-pins of the LX2201 i get 3,71 V, which should not be according to the LX2201 datasheet:
"The integrated PMOS pass element features low drop out voltage while providing an inherent load disconnect with virtually no
drain on the battery when disabled or when the input power is removed"
It seems that the MOSFET-inherent Diode of the PMOS is destroyed, because i can measure 0,23 V reverse voltage drop from the LX2201 BAT-pins to the Vdd-pins using the diode-tester of my ABB-Multimeter. Normally there should be no measurable reverse current path.

I have made these measurements with RTC enabled and disabled and found no difference.

So now i?m figuring out where to place a small switch to really disconnect the battery. Maybe someone has further facts on this.

Greetings
Norb

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