Purchased the Disney Tangled Glimmer and Glow Lantern. Trying to replace the 3 AAA batteries that it came with - but doesn't work w/ others (tried 2 different brands of batteries - both new) won't work at all, but does when I put the demo batteries back in. What's up with that?

William, went to Coleman site, looks like you remove screws on bottom of lantern to access and change battery.
Check the attached links to your manual,
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http://r1.coleman.com/Manuals/5327.pdf

Rugged Rechargeable Family Size Lantern

Coleman Rugged Rechargeable Lantern Replacement Parts Flashlights...

Battery Buyer Batterybuyer com

Turn clockwise and counter clockwise the lantern.(The upper side leds)
If not check the pin of switch that makes the contact to the upside.

were the old batteries corroded? check and clean the battery terminals , a pencil eraser works good for this

There are several different models of the Swiss Gear rechargeable lantern. On most though, you can remove the top portion of the lantern and check the lighting element inside. In most cases the elements can be removed and replaced. I have a dual filament lantern and from experience I know that every so often you may have to go buy a replacement light piece. If the lantern has been bumped or even just strapped to the outside of the pack while walking, it's possible for those elements to become loose and need repositioning or replacement so do check that. I'm sure that it should be unlikely your charger is malfunctioning unless you left it plugged in for some very extended period of time, in which case I would say the light would be more likely to burn out. But definitely try that and if that doesn't work the battery pack on the lantern itself may have an issue in which case you can always get a replacement.

The adapter need to match the charge voltage requirements of the battery in the Swissgear lantern.
This voltage maybe written on a label on the lantern.
i suggest go to the shop where you purchased the lantern for the charge adapter.

There are several options to buy replacement batteries for a Coleman rechargeable lantern, model 5348-700. I just picked up two new batteries from www.1000bulbs.com for $4.87 each plus shipping. ($20.99 for 2 with shipping!) Do a Google search for: ub645f1 6 volt - 4.5 ah - f1 terminal battery for other options

I think the switch can be replaced. Here on amazon you can purchase parts: Amazon com Coleman retro parts I hope this helped. Cheers

First try removing all four AAA batteries and the small lithium backup battery (above the four AAA batteries). Leave all batteries out for five minutes, then replace them and try to start the calculator. If this doesn't work...

Replace all but 1 AAA battery. Press and hold the "CLEAR" button on the calculator. While holding the "CLEAR" button down, replace the missing AAA battery. While still holding the "CLEAR" button, turn the calculator on. The display should read "RAM Cleared". Release the "CLEAR" button and press again to remove the message.

If that doesn't work, remove 1 AAA battery again. Repeat the preceding instructions with the "DEL" key: With the battery removed, press and hold the "DEL" key. With the "DEL" key held down, replace the battery and turn the calculator on. The screen should say "Waiting... Please install calculator software now." Release the "DEL" key. Download this program onto your computer (from Texas Instruments). Connect the calculator to the computer using the USB cable provided with purchase. Run the TI OSDownloader program and follow the on-screen instructions to re-install the calculator's operating system.

I had the same problem initially with this toy. I tried to replace the factory batteries with regular AAA alkaline batteries with no luck. I went to a specialty battery shop to try to find the carbon zinc replacement batteries also with no luck. When I got home I remembered that I had a basket full of rechargeable batteries of varying sizes so I thought that I would sift through them to see what I had. I found three of the Rayovac 15 minute rechargeable NiMH 2000 m A h AAA batteries and I charged them up just to see if they would work in the toy- THEY DID!!! I would imagine that any battery like this would work whether it was rechargeable or not- and they're probably a little bit cheaper too. I hope you have good luck making your lanterns sing and glow again too!