maha c9000 charge capacity

[skn78]

I discharged 4 new AA Enellops,

discharge capacity new AA Eneloops (current 200ma):
slot 1 - 1824
slot 2 - 1827
slot 3 - 1811
slot 4 - 1805

Then I charged 4 new AA Eneloops with power computer fan (to exclude temperature effect 38,7 CFM - 2200 RPM),

charge capacity new AA Eneloops (current 700ma), the same order as above:
slot 1 - 1705 (1824 before)
slot 2 - 1765 (1827 before)
slot 3 - 1776 (1811 before)
slot 4 - 1800 (1805 before)

slot 1 capacity must be highest (as 1824), slot 4 must be lowest (as 1805),
but on the contrary.

Is it normal for maha c9000?
Or Is it defect of the charger?

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[Mr Happy]

It is not helping matters to put that fan on top. Why don't you try a normal charge without the fan at the default 1000 mA rate?

 

[skn78]

the same situation without fan at 1000ma rate.
I thought it would be better with a fan.

 

[Mr Happy]

OK. The numbers seem a little on the low side, but within a reasonable range.

When you charge cells the main part of the charge stops a little before the cells are at maximum charge. The rest of the charge then continues for two hours at a low top-up rate after Done appears on the display.

Try running the cells through a Refresh/Analyze at 1000 mA charge, 500 mA discharge and see what capacities you obtain.

(There is no need for the fan.)

 

[skn78]

new AAA Eneloops without fan (current 500ma):
slot 1 - 715
slot 2 - 753

Previously, eneloops were discharged. And they both showed 519 mah capacity.

Slot 1 always shows lowest capacity in charge mode. is this defect of charger?

 

[lwknight]

No doubt that the chargers are a little bit quirky for sure. What do you expect for under $60.00? Its a reference tool , not a $6000.00 lab test bench set.

Maybe you should try using the fan on the air vents of the charger instead of the batteries. Results could vary.

 

[bcwang]

It looks like your first discharge of brand new cells was at a lower rate (200ma) compared to your subsequent discharges (700ma). That could account for the differences in capacity you are seeing.