I need a user's manual for Voltcraft Fast Charge Delta Peak model MW3610HC. I believe it is a battery pack charger. It is a Europian product that requires a U.S. AC adapter. I want to know what size and type of batteries I can charge. Thanks for your help!!!

I'm far from a Roomba expert and only clicked on your question out of curiosity given my background and as there was a similar question earlier Id passed.

A little research... Roomba NiMh battery pack is 14.4 v full charge. NiMh charging is a bit complicated, suffice to say it will eventually go well over 16V.

I would expect the charging station to have an initial charge voltage in excess of 12.5V. What I don't know is if its always on or waits to see if a load (roomba) attaches and then turns on its output.

So if you measured the power, contacts on the charger with a voltmeter and you get better than 12V likely its good, but really need to know what the voltage is when Roomba (with nominal battery pack) is docked.

Its likely the battery pack in the Roomba has a bad cell and will need replaced. You could measure the battery voltage but likely its low from not taking a charge. If its 14+ then the charger is working and the Roomba is misreporting.

How long is it charging until the light goes from flashing red (no charge) to yellow to finally green (full charge) ? If it's not at least 2 hours, sorry I don't have my Roomba papers available, so I'm guesstimating here, it's not getting a full charge. If you can put a voltmeter on the " fully charged" battery pack, that might tell you if the charger is the problem. Clean off the metal contacts where Roomba meets the two metal contacts on the charger. Also just because a battery pack or set is new doesn't mean it's functional. I had a new Apple battery for my laptop that didn't work when I replaced an older one.

Jan,

your battery is Shorted. it is time to buy a new vac or a replacement battery.

sorry that is such a short hand answer but that is what the charger is telling you.

needs new battery get one here http://www.buyspares.co.uk/karcher/window-cleaner/window-cleaner-battery/product.pl?pid=1227185&shop=karcher&path=68315

I had the same issue, then i just found the manual, in charging part, it says:"The charging indicator will be lit as long as the
appliance is connected to the plugged-in
charger."
Also it says:"While charging, the charger may get warm, this is
perfectly normal and safe. It can remain on
charge indefinitely without damage or danger. It
is not possible to "overcharge" the battery cells
with the charger provided"

If you're sure the battery contacts are clean and the battery really is charged, then there is faulty circuitry within the Roomba that would have to be repaired or replaced.

Confirm that the battery is inserted with the metal contacts down so they make contact with the spring terminals in the battery compartment.

Visually confirm that the metal contact plates on the battery pack, and the spring terminals in the battery compartment are clean and shiny. If not, wipe with a clean cloth or paper towel, its OK to use a little water or rubbing alcohol on the cloth, if needed, and then dry it.

Visually confirm that the metal contact plates on the Roomba, and the spring terminals on the docking station's home plate are clean and shiny. If not, wipe with a clean cloth or paper towel, its OK to use a little water or rubbing alcohol on the cloth, if needed, and then dry it.

If you have a volmeter, measure the voltage between the contacts on the battery pack If it isn't something in the neighborhood of 14 volts and is 11 volts or less, the battery isn't fully charged.

Reinstall the battery.

For the moment, please connect the power adapter directly to the Roomba rather than the docking station to eliminate one possible faultly connection.

If the battery wasn't fully charged, or you weren't able to test it, try to charge the Roomba and then retest the battery voltage if you can. If the battery voltage was higher immediately after charging, but didn't get to 14 volts, the charger is good, but battery needs to be replaced. If the battery voltage was unchanged after attempting to charge the Roomba, the charging circuitry may be faulty. If there was no light patterns when you tried to charge it, and it was plugged in to a good outlet, then the power adapter or charging circuitry is definitely bad.

If you have no voltmeter and you cleaned the contacts and tried to charge the Roomba and it works, use the Roomba and then recharge using the docking station and see if it was just dirty contacts or it won't charge through the docking station. If it didn't work, you'll need to figure out if its the battery, the charging circuitry in the Roomba, or the power adapter. If there are no lights when you try to charge the Roomba, then Either the power adapter or the Roomba power circuitry is defective, but without a voltmeter you can't find out which one, and there's no way to know if the battery is good or bad, but you know Roomba wasn't trying to charge it. If there are lights when you try to charge the Roomba, then at least you know the power adapter is good. Unfortunately, without being able to test something there's no way to distinguish between a charger that won't deliver a charge to the battery and a battery that won't accept a charge. If you want to take a guess then a bad battery is more common and less expensive to fix.

Probably the battery pack is worn out or has a "memory" problem. A worn out pack will have one or more cells shorted internally (one or more cells read 0 Volts, and an ohmmeter reads less than 1 Ohm when connected to the 0 Volt cell). If it is a memory problem, it is possible to recondition it, but not simple. You have to remove the pack, then connect a 150 Ohm resistor across each cell and let the battery sit until the cells are completely discharged. You can't just connect a resistor across the entire battery pack because the stronger cells will reverse-charge the weaker ones, which will cause them to short out.

Running the battery too far down will cause the reverse-charge problem, but not running it down at least occasionally will cause the memory problem. (Memory problem explained: the cadmium crystals grow when the battery is charged and shrink as it is discharged. However, the larger ones tend to remain intact on discharge and grow faster than the smaller ones. Eventually they block the ion flow through the battery, so the battery loses capacity. It's called a memory effect because the battery only "remembers" it has the capacity to go down as far as it is habitually used. Running the cell all the way down dissolves the over-sized crystals.)

It is possible you have a problem with the charger. Check for voltage on the charger plug. It should be about the rated output voltage printed on the charger box before messing with the battery.

The battery is probably not taking a charge anymore. And I don't think that you can get a battery replacement for this model

If both batteries are behaving the same way then this is probably a charger problem. When you insert the battery pack into the charger does the 'charging' light blink for 30 minutes (fast charge) then go steady? I noticed that one of my batteries was causing the light to come on steady immediately I inserted it into the charger. When I tried to use the battery pack I got the same problem everyone else is seeing, i.e. vacuum cleaner shuts off in less than a minute, so I conclude that when the charging light is on steady then the battery is not being charged.

If the charging light does not blink when you insert the battery (i.e. comes on steady or not at all), try removing the battery and re-inserting it into the charger.

Try a conditioning cycle on your battery packs. To do this:
* Insert the battery pack into the charger
* Before the charging light lights press the 'condition' button located just above the charging light.
* The 'conditioning' light should blink. This is a light which does not normally illuminate, and it is located below the condition button and above the charging light. The charger fan will run quieter in this mode.
* Leave the battery pack in the charger for 24 hours while this cycle is taking place.

I'm not a service technician so perhaps someone else might like to post other solutions or corrections to this one.

The battery is done for sure. take a look here Finally charging for our multi device world and choose the best one for you (by price and seller). cheers