Battery Charging Times And Endurance?

[davsas]

Hi,

i have just brought a Nissan skyline, with the following specs:

Gear Ratio: 5.7:1

Chassis Weight: 1104g

Motor: RC-540-22K

Battery pack: 7.2V SC1800mAH Ni-Cd Rechargeable

How long should i charge the battery for?

How long should it last?

And how much longer will a 4300 mAh battery last for?

Thanks in advance for your help.

Dave

[94eg!]

Hi,

i have just brought a Nissan skyline, with the following specs:

Gear Ratio: 5.7:1

Chassis Weight: 1104g

Motor: RC-540-22K

Battery pack: 7.2V SC1800mAH Ni-Cd Rechargeable

How long should i charge the battery for?

How long should it last?

And how much longer will a 4300 mAh battery last for?

Thanks in advance for your help.

Dave

All things being equal, a 4300 should last about 2.4 times as long as the 1800. Of course a batteries capacity changes with age. When they are brand new, they hold quite a bit more than their rated milliamps. After a year or so, that capacity will drop below the rated milliamps. This is why it's best to just buy cheep packs if your bashing. You really only need the extra capacity, punch & price-tag if your racing. I've seen 4 packs of 3500mah nickel-metal for $50us on eBay. They are decent quality, and the price per amp cannot be beat...

If your switching to Nickle Metal batteries, it's absolutely best to buy a peak-detection charger specifically designed for NIMH. Nickle-Metal batteries are much more sensitive to over-charging and over discharging than Nicad. This means you do NOT want to do a timed charge on them.

[driftking_v8]

All things being equal, a 4300 should last about 2.4 times as long as the 1800. Of course a batteries capacity changes with age. When they are brand new, they hold quite a bit more than their rated milliamps. After a year or so, that capacity will drop below the rated milliamps. This is why it's best to just buy cheep packs if your bashing. You really only need the extra capacity, punch & price-tag if your racing. I've seen 4 packs of 3500mah nickel-metal for $50us on eBay. They are decent quality, and the price per amp cannot be beat...

If your switching to Nickle Metal batteries, it's absolutely best to buy a peak-detection charger specifically designed for NIMH. Nickle-Metal batteries are much more sensitive to over-charging and over discharging than Nicad. This means you do NOT want to do a timed charge on them.

you can't say see there a different chargers so if you have a normal charger it takes about 5 hours ( i run on 3600 mah and i've 10 hours) And running with a 1600 can let you race for +- 15 min

[Backlash]

you can't say see there a different chargers so if you have a normal charger it takes about 5 hours ( i run on 3600 mah and i've 10 hours) And running with a 1600 can let you race for +- 15 min

What are you saying?? (and sorry in advance if english is a second language to you)

DAVSAS.... I am assuming that you have purchased one of those Chinese made, Ready-to-run HBX (Tamiya TL01 copy) Kits??? If so, I think that these are usually supplied with a slow charger. Usually, a slow charger for an 1800 mAhr battery, will charge at approx 180mA, and will need to be on for about 10 - 12 hours to fully charge the battery, but check with the instructions that came with the kit.

I really agree with 94eg! here, and say you will be better off with a peak detection fast charger. Depending on what brand and type you buy, it will generally charge your batteries in under an hour, and some will even charge them in as little as 20 - 30 minutes. Of course, the bigger the battery you are using, the longer it will take to charge, but then, a bigger battery will also run your car for longer as well. The peak detection circuit ensures that your batteries will be fully charged every time you charge, and this will maximise your runtime.

There is not a lot of difference in run time between slow charging, and fast charging, especially with todays modern battery packs.

Cheers

[madaz75]

This is a little mathematical formula came as part of the instructions with my charger.

An Ansmann ACS67dc.

Battery Pack Capacity (mAH) x 1.4 = Charging Time (Hours)

Charging Current (mA)

EG:

4300mAH x 1.4 = 1hr, 12min

5000mA

You'll need to read your chargers Output amperage.

It'll be in either Amps (A) or Milliamps (mA)

Remember 1000mA = 1A

[yamita]

It's unrelated to battery, but if you lower the gear ratio, you can get more running time. 5.7 seems a bit high..