Powerex MH-C9000 Battery Recharger

October 19, 2011 · 2 comments

in Equipment,Product Reviews,Tutorials

After researching various options for the best possible solution for rechargeable batteries (my Canon Speedlite 580 EX II eats batteries) I discovered the Powerex MH-C9000 Battery Recharger and I bought this charger and 8 rechargeable batteries from Outdoor Photo.

Product Specs:

Four independent slots – It’s like having four charger-analyzers for AA and AAA NiMH / NiCD batteries.

Delivers just the right charge – Independent negative delta V, temperature and timer protection eliminates over and undercharging.

Super light travel worldwide power supply and 12V compatible – Worldwide 100-240V switching adapter – light weight and small. Also compatible with 12V input. Will work on car when used with the optional cigarette lighter adapter.


Five modes of operation

Charge: Recharges the battery at the selected rate. Suitable for batteries used frequently.

Refresh & Analyze: Charges the battery, rest for one hour, discharge, rest again, then recharges it. Selectable charging and discharging rate. Suitable for batteries stored for more than two weeks but less than 3 month or those showing poor performance.

Break-In: Also known as IEC capacity measurement and “Battery Forming”. Charges battery at 0.1C for 16 hours, rest for one hour, discharges battery at 0.2C, then recharges again at 0.1C for 16 hours. Suitable for new batteries and those stored for more than 3 month.

Discharge: Discharges the battery at the selected rate.

Cycle: Performs charge-discharge cycle for up to 12 times with discharge capacity stored in memory. Recharges battery after final cycle.


New ways to take care of your batteries and maximize runtime!

Battery Matching – In most devices, usually two or more batteries are used together. When batteries are used in a series, the performance is limited by the worst one. In other words, one poorly performing battery can significantly reduce the device runtime.

Battery matching refers to grouping batteries with similar “actual” capacity. To perform this, use the Refresh & Analyze mode to determine the battery capacity. Group batteries with capacity within about +/- 5% of the rated capacity.

Battery Forming – New batteries and those stored for extended period become chemically deactivated. Battery forming is a charge-discharge-charge cycle which forces a full charge into the battery at a very slow rate. This process activates the battery. In certain cases, it needs to be repeated two or three times. Battery forming can be performed using the Break-In mode.


What are the recommended charging and discharging current for my battery?

The recommended charging current is 0.5C, or 0.5 times the battery capacity. The recommended discharging current is 0.25C, or 0.25C times the battery capacity.

Here are some settings for common batteries: 

2700mAh Charge: 1300mA Discharge: 700mA

2650mAh Charge: 1300mA Discharge: 700mA

2500mAh Charge: 1200mA Discharge: 600mA

2300mAh Charge: 1100mA Discharge: 600mA

2200mAh Charge: 1100mA Discharge: 600mA

2100mAh Charge: 1000mA Discharge: 500mA

2000mAh Charge: 1000mA Discharge: 500mA

1000mAh Charge: 500mA Discharge: 200mA

900mAh Charge: 400mA Discharge: 200mA

850mAh Charge: 400mA Discharge: 200mA

800mAh Charge: 400mA Discharge: 200mA

700mAh Charge: 300mA Discharge: 200mA

650mAh Charge: 300mA Discharge: 200mA

600mAh Charge: 300mA Discharge: 200mA

{ 2 comments… read them below or add one }

Mehdi September 22, 2012 at 3:45 pm


How could I buy it in South Africa?

I couldn’t find it on websites.

rikkihibbert September 25, 2012 at 3:07 pm

You can buy them from Outdoor Photo, based in Pretoria, but they will also be at the Photo & Film expo at the Dome 18 – 21 October.

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