Thank you for purchasing the Powerex MH-C9000
Charger-Analyzer. Read these instructions carefully
and thoroughly before operating this unit. IMPORTANT
SAFETY INSTRUCTIONS. READ AND SAVE THESE
OPERATING THIS PRODUCT INCORRECTLY CAN
CAUSE DAMAGE TO THE BATTERIES.
READ MANUAL COMPLETELY BEFORE USE.
Do not charge battery cells other than NiMH or NiCD. Please check
with the battery manufacturer to ensure it can accept the
programmed charging and discharging rates. Do not expose the unit
to rain or moisture due to the risk of fire.
Do not operate the charger if it appears damaged in any way.
Always place the battery cells with positive tip facing the top.
Incorrect polarity may cause fire or explosion. Observe polarity
diagrams located on the charger.
Do not allow the unit to be exposed to direct sunlight. Operate in
well-ventilated area. Do not place unit on the carpet.
Do not allow the battery terminals to become shorted.
To reduce the risk of damage to the power cord, always pull by
connector rather than the cord.
Use only the supplied adapter or optional regional and car adapter
offered by Maha Energy. Using third party accessories voids the
FEATURES & SPECIFICATIONS
Four independent slots for AA or AAA NiMH batteries.
Backlit LCD display.
Digitally displays capacity, voltage, time and current.
Five modes of operation: Charge, Refresh & Analyze, Break-In,
Discharge and Cycle.
19 selectable charging current from 0.2A to 2.0A.
10 selectable discharging current from 0.1A to 1.0A.
Worldwide power supply.
Topoff Charging Current:
Capacity Storage Memory:
PRINTED IN TAIWAN A03-3713420-496
Programmable from 0.2A to 2.0A in
increments of 0.1A
Programmable from 0.1A to 1.0A in
increments of 0.1A
Charger Input Power:
* Always ensure that the batteries can accept the programmed rates.
GENERAL BATTERY EDUCATION
What is 0.1C, 0.2C, etc?
"C" stands for the battery capacity and the number in front of it is the
fraction of the battery capacity. For example, 0.1C means 0.1 times the
capacity for the battery. For a 2700mAh battery, 0.1C would be 0.1 times
2700mAh which equals 270mA.
Choosing the right charging & discharging rate
Charging at a rate below 0.33C and above 1.0C is not
Charging too slow may prevent the charger from terminating correctly.
Charging too fast may damage the battery.
Typically speaking, slower charging rate will yield better battery
performance but requires longer time. Faster charging rate may not
charge as fully and battery temperature can be higher.
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.
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
Battery forming can be performed using the Break-In mode.
100 to 20,000mAh