Camera is telling me 'change the battery pack' but both of the battery has been fully charged (and the spare battery). Camera and batteries are approximately 5 years old.

to prolong the life of your batteries the best practice would still to drain the batteries first and have it fully charged . in fully draining the batteries you may need a spare battery pack when your using the camera on events or taking pictures on your vacation .

if you do not have the luxury of draining the batteries every time better have a routine schedule maybe every 1 month you can drain your batteries before charging them

What's more likely to be the issue is that the spring loading on the door has loosened over time, and the battery simply isn't being pressed up against the contacts in the camera firmly enough.

Fuji FinePix Z2 Digital Camera

lens retracts fully into the body and is protected by an automatic metal cover - no more lost or dangling lens caps.
The F410 Zoom makes use of the new xD-Picture Card media that is smaller than a postage stamp. Fuji supplies a 16MB card and they are available now up to 256MB. The F410 is powered by a small proprietary lithium rechargeable battery. This battery pack performed well in our use and if the color LCD is used sparingly, I see no problem with the battery delivering enough power for a conservative day's use. As with any camera that uses a proprietary battery pack, it is always a good idea to purchase and carry a charged spare at all times. The included power supply / charger is an auto switch type and operates on 100-240V AC which is convenient when traveling. It charges the battery in 3 hours (or less) while in the camera and also functions as an AC power supply for extended use at home. The battery is also charged any time the camera is placed in the optional camera dock.

The light usually changes colors or goes from flashing to solid even from a light being on it going off when charged. Every camera is different. Normally a good hour will fully charge most camera batteries.

My kodak camera requires taking out the battery pack and charging outside of the camera. My batteries have a generic charger I got off of amazon that has a red and green light on it that tells you whent he batteries are fully charged.

If the charger is blown, that might explain why they are not charging.

Are you trying to use AA batteries instead of the recommended battery pack? I would use the recommended battery packs available through amazon.com.

hello there use your USB cable for charging your camera battery. No need to take out the battery from camera. Some Tips.

You may choose our Smart Charger (0.5A,UL listed) for 3.7 V Li-Ion battery Pack to recharge this battery pack. Must charge the battery pack with correct polarity. The estimated charging time is 2.76 hours .

You may connect two 3.6v 920 mah pack in either series or parallel connection for making a higher voltage and higher capacity pack.

Hope you have those staff with your camera. use that for charging. Follow the link.
http://www.batteryspace.com/smartcharger05afor37vli-ionpolymerrechargeablebatterypack--ceullisted.aspx

Thanks, i am waiting for your feed back & if you satisfied then thumps me please.

Hello,

You need to take out the battery pack inside the camera and charge it using its battery charger. You know when the battery is fully charged when the light on the charger changes from red to green.

If you have other questions, please let me know.

Turn off the camera, remove the battery pack. Allow the camera to remain without power for 30 seconds. Reinsert the the battery pack. Turn on the camera.

Please make sure the Battery is fully charged before performing this steps.

Also try changing the Batteries of the Camera. "AA" NiMH, "AA" Alkaline, "AA"
Nickel-Metal Manganese are the compatible Battries for the Camera. Hope it works!

Clean the battery contact both ends of the chamber

Possible failed battery showing fully charged but actually not -or even charger.No reset] Disconnect from the wall socket- re connect and tell us if the battery is now charging. If show full- replace battery. Also tell Sony customer support