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Old Apr 15, 2005, 12:26 PM   #1
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I live in Thailand. There is only one brandname charger. It is SONY.

I plan to buy BCG34HRMD4 model but I couldn't find the exact deep

technical spec. Price when convert to USD is $55.

Here we don't have unsatisfy policies, we can't return refund the product.



1. These model have 4 indepedent circuits ?

2. Why charge 1-2 cells is faster than 3-4 cells ?

I guess, it reduces the output current for all 4 cells.

The power suppy has a limit power output ( watt )

3. Very strange in sony website said:
Quote:
Charging Refresh

1 - 2 cells3 - 4 cells1 - 4 cells

NH-AA (230mAh) 135min 270min 4.5 Hr

NH-AA (2100mAh) 120min 240min 4.0 Hr

NH-AA (1700mAh) 100 min200min3.5 Hr

NH-AAA (800mAh) 70min 140min 1.5 Hr

NH-AAA (750mAh) 65min 130min 1.5 Hr
4. Why It charge AAA 750mAh in 65 mins but charge AA 2100mAh in 120 mins ?

5. How they know the battery type ( AA or AAA ) ?

6. It has safty timer ?and how long ?

7. Can I charge only 1 cell and then 30 mins. later insert new 2 cells into slot to charge ?

8. Does it has trickle charge ? and how much ?

9. Does it allow to charge cell that below 1 Volt. ?


Thank for advance...



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Old Apr 17, 2005, 6:43 AM   #2
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Don't have such a charger but I cananswer based on my experience with similiar Sanyo and Sony chargers:

1. These model have 4 indepedent circuits ?

Based on the specs, they have 2 separate charge circuits (left pair and right pair) - each of which can 1 2100mAH cell in 120min or 2 cells in 240 min. However, the cutoff (when full charge is reached), and charge level measurment circuits are independent.

2. Why charge 1-2 cells is faster than 3-4 cells ?
I guess, it reduces the output current for all 4 cells.
The power suppy has a limit power output ( watt )

Parallel circuits. Do note that these chargers expect you to charge only SETS or MATCHED PAIRS together.These are batteries that are always charged and discharged together and never separated.

4. Why It charge AAA 750mAh in 65 mins but charge AA 2100mAh in 120 mins ?

Because AAA have lower capacity, they have a separate set of terminals to provide a much lower charge current- hence the difference in charge times.

5. How they know the battery type ( AA or AAA ) ?

Smaller batteries means different charging terminal(s)

6. It has safty timer ?and how long ?

7. Can I charge only 1 cell and then 30 mins. later insert new 2 cells into slot to charge ?

No problem - but I believe these chargers need to be unplugged when replacing batteries, though - so it's like starting a new charge cycle.

8. Does it has trickle charge ? and how much ?

9. Does it allow to charge cell that below 1 Volt. ?

Check on thefeedback in Amazon here http://www.amazon.com/exec/obidos/tg...187099-1319202

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Old Apr 22, 2005, 11:48 AM   #3
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Thank you for the info. I decide to buy BC-900 very soon.

Sony Thailand told me via mail:

-Quick charge at DC 1.2 V, 1050mA(AA)x 2 /525mA(AA)x4

- No temperature detection circuit.

- No timer.

:?


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Old Apr 23, 2005, 7:37 AM   #4
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Try this as an alternative :-)

http://www.rezap.com.au/
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