Replacing a 6 volt battery

4700 Takes 6 volt lantern battery

https://martinsburgflea.hibid.com/lot/83580-154713-7539/lumilite-4700-krypton-flashlight/

4400 takes 4 D size

http://www.guardiancatalog.com/Lumilite-Industrial-4D-6V-Krypton-Lantern-p/79470.htm

4200 appears to be this little blue flashlight. I guess 2 x D size

https://www.k-bid.com/auction/26730/item/45


https://www.google.com/search?q=Lumilite+Flashlight%2C+4200+Krypton

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The question does not make sense since it doesn't pertain to the 6 volt dc flashlight

Since batteries and bulbs are new/ok, check for a bad connection. In older version using 4 lantern batteries, open the battery compartment by unscrewing the knob on top of lantern. The lantern bottom comes off once unscrewed (of course you did this to change batteries). There is a "C" clip on the lantern center shaft; remove this by prying with screwdriver or with pliers. Carefully raise the battery contact plate and check slip-on wire connections. Clean as needed (Scotch-Brite works well) and reconnect. Squirt some contact cleaner in exposed switches, work switches back and forth. Inspect circuit board for obvious corrosion or damaged parts (this damage may "total" the lantern). Re-install plate aligning grooves with ribs. Install batteries and test.

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

The bezel (the circular portion on the front of the flashlight that holds the bulb and lens) will unscrew. The old battery should slide right out.

Hope this helps.

I've owned this flashlight for years. In the comment above, ignore the instruction to remove the rubber casing around the lamp area. Simply grasp the whole front of the lamp piece (including the rubber cover), and twist in a counter-clockwise direction to remove. Then squeeze together the two black tabs and pull the battery compartment out to replace the batteries.

Here in the UK I have never had much luck with flashlights (or torches as we call them!) stored in the car-exactly the same problem as you -the battery is always flat when you come to use it. I have even tried slackening the base off to break the contacts-makes no difference. Best to get a rechargeable one like this http://www.ebay.com/itm/2-pcs-15-LED-RECHARGEABLE-WORK-LIGHT-FLASHLIGHT-TOOLS-/330510652438?hash=item4cf3f85416:m:m9OEtxPyWSFj8nAyzf1i4Mw
Only downside is you can't leave this model on charge so if you can try to find one with a regulated power supply which can be left permanently on charge without damaging the batteries. Avoid the million candlepower ones too-yes they are very bright but only last 15 minutes on a charge!

Check the battery with a volt meter to make sure you have the correct voltage. If not, replace battery. If correct voltage, bypass switch to determine if it is good or not. If not, replace. There really isn't much to go wrong on the lanterns except the bulb or battery.