Logitech Dinovo keyboard charging problem solutions

The dinovo Edge is one of Logitech's premium quality keyboards with a flat profile, quiet keys and Bluetooth so that it pretty much works on anything. Over a few years use I can vouch that a charge of the battery has it working for a couple months. A 10 minute charge lasts a whole day. And though these are no longer unique features, the keyboard is lovely to use. My only gripe is that it's less useful for left handers.

Backing up these claims is a three year warranty. I've worked on Logitech stuff for years and it is typically very up to spec. 

There are several reports of a problem where the normally green blinking charge light alternately blinks red and green. One solution is to contact Logitech and get their experience on this. 

But you could try a few other things first. The hassle is in proportion to the gain. My thesis is that if a battery says it's charged or throws an error, it's more likely due to a signal from the temperature pin of the battery or a change in the charging current or suchlike. These occurs in situations other than "it's broken or dead". Here's what I do when I think the keyboard is sick, rather than terminally ill: 

a) Repeatedly put the keyboard in and out of the charging dock. Try this with the keyboard either off and then on. One way or the other, you might be able to recharge it. This worked for me.
b) Drain the battery (put a weight on a Fn key) and see if you can better charge from this empty state. This also worked for me.
c) If the red / green flashing recurs leave the keyboard somewhere cold. Then charge till you see an error, then cool and repeat. This worked for me and we were working good for months at least.

d) Not tried yet and I'm keeping this in reserve: use a different power supply to get enough juice in the battery to make it happy again. As with over-discharged mobile phone batteries, a higher or lower charging rate can knock some sense into them. Monitor this in case the temperature goes awry.

e) I have not tried to replace the battery. The battery is not soldered to the board, however removing the orange underside will make a mess of it. I'm saving this for a desperate moment. 
[UPDATE:  After  successfully using the tricks on this page over a few years, I ran out of luck,  the red-green flashing continued and my desperate moment had arrived. I followed a Youtube video to use a hairdryer to remove the orange underside; then undo several screws and ultimately to swop the battery for a new one. The 'new' battery  actually came from an old Sony camera. This has been a huge SUCCESS as the keyboard now hold a charge and also charges with ease. 

f) Some folk suggested to unpair the keyboard, reinstall the (optional) Setpoint monitoring software or hitting various keystrokes. I suspect these are accidentally useful.

HP Touchpad (tablet) is not dead or bricked

It's a scary moment when you can't bring your device back to life. The fix on this page also worked on an old phone where the unit had overdischarged. The HP Touchpad has been incredibly reliable, but if it were to crash with the wireless still running, it's going to run down the battery to nothing, or worse over-discharge the battery. It can be brought to life in various ways below.

• Normal start - Press Power - but if it doesn't start
• Soft reset - Press Power + Home button for 10 to 60 seconds or
• Press Power + Volume up button for 60 seconds
• See other variations which people have reported at http://forums.webosnation.com

Of course  none of the above will work if there's no power in the unit. And there are situations where it's not possible to get power into the unit - possibly the unit has crashed and is stuck into a loop OR as someone suggested the unit has over discharged the battery. The solution was to change to a different charger. The normal HP Touchpad USB charger is more powerful than many. If you try a regular charger, the Touchpad may complain that it's not getting enough juice.  What fixed it was to use the low USB current from a desktop PC. Within a minute it was getting a trickle of energy and it could then be weaned back to its regular charging current.

I found the solution at WebOSnation and I have to thank the guy who, fearing the worst, took his apart to trickle charge the battery. Realising this was a last resort, I read more to find the guy suggesting the low current charger. I've tried something similar with a charging problem on a phone and the battery was totally flat. I removed the battery, connected the terminals to a Universal phone battery charger (a few £ on ebay). An hour or so later the old phone battery had enough juice to cope with a normal charge. 

A proper science explanation for this is welcome.

HP touchpad was bought for the ridiculously low price of £89 when HP's sold off the stock when after 6 weeks trading they realised that this was not going well. A year later (August 2012) it is able to dual-boot between Android ICS and WebOS. Android has the edge with tons of useful apps. To do the upgrade to Android see the help at liliputing.com. It is only a bit scary.