My pro tech 6810 probably need a new charger and battery, where would i find such items,

MagSafe Wont Charge MacBook Its Probably Simple Fix

http://www8.hp.com/h20621/video-gallery/us/en/customer-care/4117382113001/replacing-ink-cartridges-on-the-hp-officejet-6810-and-officejet-pro-6830-e-all-in-one-printer-series/video/

I'm unclear however
Does the new charger get too hot? If so the problem is not the charger or the socket.
Does the laptop work with the new charger plugged in but no battery? If so the socket on the laptop is probably ok
Is the actual charger melting or is it just the plug that goes in the laptop that's getting hot, if it is the plug on both chargers then the socket will need repairing or resoldering, they are a weak point, the soldered pins go high resistance and can generate a lot of heat around the plug and socket. Its usually obvious if the socket is faulty because as you move the plug it makes contact intermittently.
DONT USE THE CHARGER THAT'S MELTING and if both are getting hot have the socket repaired.
If only the one charger getting hot the short is probably in the plug on that charger but read on
On a different note the genuine chargers should be over current protected and overheat protected, they should never melt.

I too need the same batteries but Oster stopped making them and now if you want a battery to fit the female part of you set you need to buy a new battery with a new gizmo at the price of over $150 Making what you have worthless and making what you need cost more than two old batteries or a new machine all together. Its a real rip-off.

If the charger fails to recharge the new battery, the item is defective and will need to be replaced.

For lipo you need a specific charger and you can use lipo two cells dont go on three cells you push it to hard.

Any "proper" shop should be aware of the precautions that need to be made when changing over a battery so that none of the items need re-setting. It's not the type of item that should be a "dealer only" repair,

http://www.sears.com/shc/s/p_10153_12605_00981808000P?vName=Tools&cName=PowerToolAccessories&sName=Batteries%20and%20Chargers&psid=FROOGLE01&sid=IDx20070921x00003a

ebay is your best bet...

Try www.ebay.com and on the search space, copy and paste on the following ebay Auction IDs (just paste the number I give you):

Battery:
eBay Auction ID: 270215466248
Description:
1.5A Battery for Acer N30 N-30&Yakumo 1038006/PS1020#1

Approx. 7GBP = 13USD


Stylus (pack of 3):
eBay Auction ID: 280204418443
M509 3 pcs stylus touch pen for acer N30 N 30 PDA

Approx 1.5GBP = 3USD

Universal Travel Charger:
eBay Auction ID: 270216695513
Travel Charger for Acer N30 (UK/EU/US/OZ Charger)

Approx 7GBP = 13USD


These prices do not include shipping which may vary depending on your location... (these items usually ship from Hong Kong).

PS: these are auctions so the designated items may only be available for a limited number of days...

Hope this helps