Filed under: FAQ by Kel |
How many batteries can I charge at the same time?
You can charge up to Ten 9V batteries at the same time in the Maha MH-C1090F 9V fast charger.
Do I have to charge 10 batteries at a time?
No. The MH-C1090F has ten individual charger circuits, so you can charge any combination of 1 to ten batteries.
How will I know when the batteries are charged?
When the batteries are fully charged, the LED beside the battery will change frm red to green. Each battery is charged individually, so it will be cahrged to it’s full potential.
Do I have to take the batteries out once they are charged?
No, when the batteries are charged, the 1090F charger will measure the slight negative change in voltage and know that the battery is at full capacity. It will then switch to a trickle charge to keep the batteries at full capacity until they are needed.
We tried using rechargeable batteries in our microphone but they went flat in the middle of a performance. How do we avoid this from happening?
Todays rechargeables have much higher capacities than even 2 years ago. Our customers are getting 3 to 5 hours from their microphones using the Maha 9V batteries and the Maha 490F or 1090F. This is enough for almost any performance! Rather than leave them in the microphone for several performances, take them out after each performance, and put them back in the charger.
Do I need to run the batteries flat to keep them in good condition?
The older NiCad batteries were succeptibe to the memory effect if not empties. NiHM batteries have a different chemistry, and do not require emptying. Also, the Maha charger uses a unique Flex Pulse charging method which conditions and enhances 9V rechargeable batteries as they are charged.
Can I use the MH-C1090F ten bank charger to charge my older batteries?
Yes. The Maha 1090F is compatible with 7.2V, 8.4V, and 9.6V batteries, so long as they are Rapid Charge Capable 9V rechargeable Batteries. It is also capable of capable of reviving older 9V rechargeable batteries which may no longer be accepting a charge.
We use a LOT of batteries. Is this charger suitable for commercial use?
The 1090F is designed for commercial or home applications. Many professional stage compnies use Maha battery chargers and 9V rechargeable batteries. The charger is very well made, and comes with a 3 year replaceent warranty.
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I purchased the MH-C490F Stealth to recharge 9V 250 mAH NiMH batteries for use in some noise monitoring equipment which only draws a low current. All five batteries went flat within 2 hours, despite the indicator light on the charger going to green. I tried it out again with the same results. When I use alkaline 9V batteries in the same equipment, they last about 50 hours. Is there something wrong with the charger?
Comment by Robert — June 4, 2007 @ 1:34 pm
Hi Robert
I would suggest that the problem lies with your batteries. It sounds like they are not holding their charge. We have customers using Maha 230mAh batteries in Microphones for stage productions. They are switched on at 6pm when they put on their costumes and still have charge at the end of the show at 11pm.
I suggest that you check your battery voltage after charging, using a multimeter. If they are 9.6V cells, they should be between 11.2V and 12V. If they are 8.4V cells they should be between 9.8V and 10.5V. Check the voltage again one day and one week after charging. If the voltage is still close to fully charged, the batteries are OK. If they have dropped 20% or 30% in a week, then they are not holding charge. If this is the case, I would recommend you try some Maha Powerex 9V batteries
Comment by Kel — June 9, 2007 @ 8:51 pm