Battery charging times is this right?

[baha_guy1]

Battery 1: Says on the battery Shuangbao 1.2v 4/5 sc size 1500mAh.
Standard charge: 8Hours at 300MA Rapid Charge: 1.4Hours at 1500mA
We worked it out that we need to charge it for (9 hours: 40 mins)
Is this right?

Battery 1


Battery 2: I got myself a spair battery today but it has one less battery but was told to still charge it for the same time is this right.. if not how long should i charge it?

All the battery says is 1500 mah ni-mh 1.2v

Battery 2


I dont no if you need to no this but just incase here it is
My Charger Input: Ac 220v 50/60Hz
OutPut: Dc 10v 250mA

[Panoptes]

Re: Battery charging times is this right?

The formula is generally:

Capacity x 1.4 / Charge rate.

So 1500mah would be 7.5hrs (at 300mA)

Not sure about the seven cell but it shouldn't make a difference. Would be interesting to know though...

[Sci Fi Steve]

Re: Battery charging times is this right?

I could never figuer it out so brought a smart charger when it beeps it is done


I was unable to link but googgle green batteries and or Battery charger calculator

[zulu]

Re: Battery charging times is this right?

me too, except mine has a green light when it is done, i recomend you pick one up, they are only about 20-30 quid.

[psirus101]

Re: Battery charging times is this right?

This doesn't answer the OP's question but ...... ProPeak. Best investment of £40.

[bigdave196]

Re: Battery charging times is this right?

Battery 1 is a 9.6v battery (8 cells of 1.2v, 8 x 1.2 = 9.6), whereas Battery 2 is an 8.4v. This means ideally, you should be using chargers with matching output voltages (a 9.6v charger for the 9.6v battery etc), however, I don't think using a 10v charger on both will that much of an issue.

As for how long to charge, the formula is Battery Capacity / Charge Rate x 1.4 or 1.5 depending on if it's a Ni-mah or Ni-Cd (unfortunately I can't remember which way around it is).

So, assuming battery 1 is also Ni-mah, and assuming that it's 1.4 for a Ni-mah (I think it is), the charging time for both batteries is as follows:

Battery Capacity = 1500mAh
Charge Rate = 250mA (that's what your charger says it outputs)
Time = 1500/250*1.4
= 8.4 hours or 8 hours 24 minutes

If Battery 1 is a Ni-Cd (and again assuming I've got the constants the right way around) then the charging time would be 9 hours.

[baha_guy1]

Re: Battery charging times is this right?

Thank you very much for your help.

8 hours 24 minutes Ni-mah
9 hours Ni-Cd

:D
I have 2 charge both for the same time.
So if im right i have to charge them for 8 Hours 24 Minutes

[FunkycHUNKY]

Re: Battery charging times is this right?

You could buy a 1,500 mah charger for £20, i think it even does 3,000mah

[bigdave196]

Re: Battery charging times is this right?

You could buy a 1,500 mah charger for £20, i think it even does 3,000mah

That would probably ruin the battery very very quickly