Replacing your Ipaq Battery

[bkbroil]

The Gadgeteer has a DIY article on upgrading that old ipaq battery to a 1600 mAH battery from Crayton Electronics.
Here's the results after the replacement:

Here is what I did:
I changed my backlight setting to medium for the duration of the test.
Using the Wi-Fi card, I copied 60MB of MP3s from my desktop to my CF memory on the same card.
I started WMP and played the MP3s in the background for the duration of the test.
I then used Activesync to synchronize wirelessly with my desktop.
I composed some emails through Pocket Outlook.
I accessed my Hotmail account with Pocket IE and composed some more emails.
I opened MSN Messenger and did some IM with friends/family
After 1hr and 30 minutes of this continuous activity at medium brightness, I still had ~70% battery left!
In my 2nd test, I set the brightness to Super-Bright and left the iPaq idle. I had already been using the iPaq on and off throughout the day at medium-bright and my battery meter was reading 80%. At Super-bright, it took 16 minutes to drain another 10% of the battery. This approximates to ~2hrs to drain down to 40% battery capacity from a full charge. I think it reasonable to say that this meets if not exceeds the original specs for this brightness level.
Conclusions:
This is definitely a great way to extend the life of your iPaq workhorse that has already given you years of service and at a very affordable price!
Price: $39.99
Pros:
Very reasonable price
Easy to install
More battery life/capacity than stock 950mAh
Cons:
Less battery life/capacity than other more expensive competitors
Minimal documentation