My simer ace in the hole a5000 will not charge my 2.5 year old battery. The battery voltage reads 10.75 volts. I replaced the twelve volt charger and it originaly lit the yellow charging light , but it no longer does. The ace inthe hole unit is 17 Years old. The green light comes on and the pump runs weakly when the respectine buttons are pushed. Need sealed contol unit? or what? Thank you.

normally the battery gives up in this vacuum cleaners through my experience

confirm the charger first
use a voltage tester to check the voltage coming from the charger

the voltage will read from 12volts to 18 volts
depending you vacuum model.


If you the voltage is present then the battery is dead.

I'm not familure with your device but this is battery charging101. For a battery to charge the input voltage must be higher than the operating voltage of the battery. An example of this is your car. You have a 12 volt battery in your car and the alternator applies 13.4 volts or so to charge it. It is the same with any battery charger be it phone, laptop, chordless drill or small AA,AAA,C,D battery charger, that being said is the Dyson charger a seprat device? If so it can easily be tested at Batteries Plus, Any big box auto parts store, any high school electronics class. Check your owners manual it should give you the operating voltage, check that against what you discover about your charger. The charger only needs higher voltage output than the battery it doesn't have to bee a lot more. If you have further ? Email me at [email protected] good luck. Ps, you can by a reasonably accurate and easy use volt meter at W-mart for under $20. I am attacking video from u tube as to usage it's not difficult and well worth the money.

How old is your battery? and did you keep it on charge when it was not in use?
Most rechargeable batteries require a spindown, where as you completely discharge the battery before recharging it again.
I know you aren't wanting to hear this but in all probability that battery is spent and will need to be reconditioned at a battery place, however, it will cost almost as much as a new one it would be your call.
if you have a ohm/volt meter it might be possible to look at the charger and get a volt/amp reading and then test it see if it is putting out the proper voltage it could be putting out a trickle charge and it would take forever to charge it.
there is one other situation to look at and if the beater brush or motor is causing a resistance it will pull a battery down quick.
I do not own this vaccum so I can only guess as to the possibilities.

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.

If the unit itself is under a year I would take it back to the store. It sounds like the unit is not charging properly which you already know. Check to see if you actually have charge coming out of your charger. Usually there is a charge light. Is it bright when charging? If you have a volt meter you can check the voltage coming out of the charger to verify if there is indeed voltage coming out. Let me know what you discover.

Try running the battery all the way down by letting the vacume run in a corner or another room and even when it stops leave it on for a hour to drain the battery. Then shut the switch off and try charging the battery. Make sure the charger is putting out enough volts by looking at the rated output of the charger and while it is plugged in check it with a volt meter. If it does not hold a charge and the charger is putting out the right voltage you need to purchase a new battery for the vacume

if it will not hold a charge - then I would say that the battery is weak,old and bad and needs to be replaced. there is also a chance that the charger ityself is not putting out enough voltage to totally charge the battery. use a volt meter to check the charger and see if it is putting out the correct voltage,, if it is at the right voltage - then replace the battery.

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Hello ,this unit has a smart battery charger. This type of charger will charge at a higher voltage to maintain the battery by keeping the plates clean. Have you checked the charging voltage at various times to verify that the voltage is always at 15.7? The voltage should level off at around 14 volts. Also, try another voltmeter just to confirm the voltage. Some meters can read differently. I had a meter that did this for me and it drove me slightly nuts. I hope this helps.

My DC16 also had charging problems. I called Dyson and they sent a new charger. The old charger only produced 23.6 volts DC, not the rated 28 volts DC. The new charger has a thicker round wire and produces 28.1 volts DC. Put a volt meter on your charger terminals and see if it is producing enough voltage to fully charge the battery, 28 volt DC. If not you need a new charger.

Reset the Roomba by removing it from the charger, then holding "spot" and "dock" for about twelve seconds. When you let go, the unit will play an ascending series of notes. Then recharge it overnight. If the run time is still short, give Customer Support a call-- be sure to have the Roomba with you when you do.