Battery Charging Time ?

TheAlkaline

I have problem with calculating my charging time for my battery.

I have 7 cells of "Ni-MH2/3A1500mAh 1.2V"
And my charger says that its suitable for batteries in range of (4.8V - 9.6V)
It's bit too high for my cells, so would charging it with my charger would damage it ?

Extra info of charging time given at "Operating Instructions of Charger":

Cells

Charging Current

Charging Current / 100 mAh

4

350mA

24 min

5

300mA

29 min

6

250mA

34 min

7

200mA

45 min

8

150mA

56 min

Edit, I just copped on that Its 7 cells by 1.2V, that gives me 8.4V So if 100 mAh for 8,4V Battery = 45 min, then (1500/100) x 45 = 675 minutes which is 11,25 hours.

.K.A.L.I.M.A.

TheAlkaline wrote: »

I have problem with calculating my charging time for my battery.

I have 7 cells of "Ni-MH2/3A1500mAh 1.2V"
And my charger says that its suitable for batteries in range of (4.8V - 9.6V)
It's bit too high for my cells, so would charging it with my charger would damage it ?

Extra info of charging time given at "Operating Instructions of Charger":

Cells

Charging Current

Charging Current / 100 mAh

4

350mA

24 min

5

300mA

29 min

6

250mA

34 min

7

200mA

45 min

8

150mA

56 min

7 cells x 1.2v (1 cell each) = 8.4v 1'500mAH
Each cell should carry 3A.

(Please correct me if I'm wrong).

Can I ask what charger you have? A picture of it would be nice or even a link if you bought it online.

TheAlkaline

.K.A.L.I.M.A. wrote: »

7 cells x 1.2v (1 cell each) = 8.4v 1'500mAH
Each cell should carry 3A.

(Please correct me if I'm wrong).

Can I ask what charger you have? A picture of it would be nice or even a link if you bought it online.

http://farm7.static.flickr.com/6169/6203284351_5504e67f46.jpg exactly this one, but is it normal for battery to charge 11,25 hours ?
I heard that it should take that long for the first charge, and after its about 4-5 hrs

.K.A.L.I.M.A.

TheAlkaline wrote: »

http://farm7.static.flickr.com/6169/6203284351_5504e67f46.jpg exactly this one, but is it normal for battery to charge 11,25 hours ?
I heard that it should take that long for the first charge, and after its about 4-5 hrs

See the problem now. The charger you linked is exactly the same as this: http://www.airsofteire.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=1164&category_id=12&manufacturer_id=0&option=com_virtuemart&Itemid=26. It will not cut-off when the battery is full, destroying the cells and making the battery useless.

Since your battery is a 8.4v 1'500mAH (7 cells), the charger will output 200mAH every hour, so roughly:

5 hours = 1'000mAH
2 1/2 hours = 500mAH

All together = 7 1/2 hours charge.

I would strongly recommend a better charger, like this: http://www.airsofteire.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=655&category_id=12&manufacturer_id=0&option=com_virtuemart&Itemid=26

TheAlkaline

.K.A.L.I.M.A. wrote: »

See the problem now. The charger you linked is exactly the same as this: http://www.airsofteire.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=1164&category_id=12&manufacturer_id=0&option=com_virtuemart&Itemid=26

Since your battery is a 8.4v 1'500mAH (7 cells), the charger will output 200mAH every hour, so roughly:

5 hours = 1'000mAH
2 1/2 hours = 500mAH

All together = 7 1/2 hours charge.

I would strongly recommend a better charger, like this: http://www.airsofteire.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=655&category_id=12&manufacturer_id=0&option=com_virtuemart&Itemid=26

Thanks mate, now I know that I have time to get my battery charged for skirmish tomorrow