Charger question for the guys here
04-09-2004, 02:28 PM
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Charger question for the guys here
I have a Tower hobbies model 420 AC/DC 6-7 cell charger. I just got a 2nd hand Corona Helicopter and it came with a couple of battery packs that are 7 cell 8.4v 3000 mAh. My question is this; Can the charger I have charge these 3000 mAh battery packs and if so, for how long should I charge them for...? Below is more info and a pic of the charger I want to use.
This is one of the lowest-priced chargers around. It is an AC/DC charger that
is perfect for the entry level setup. It safely fast charges 6- or 7-cell
batteries, then switches automatically to TRICKLE charge. Ampmeter shows
charge progress. This charger has a One-Year Warranty.
FEATURES: Safely fast-charges fully drained batteries in 20-40 minutes
Charge/Discharge switch lets the modeler make the appropriate
selection
Simple to use: set timer to 15 minutes ... built-in electronic timer
automatically switches to TRICKLE when knob is at O (zero).
AC input .8 amp fuse protected for safety (bus, glass tube type)
INCLUDES: One 6-7 cell charger w/connector that plugs into a Tamiya battery,
AC outlet plug and DC alligator clips all prewired.
One Kyosho battery adapter
One extra fuse
SPECS: Input Voltage: 110V AC US Standard
12V DC
Length: 6-3/4"
Width: 4-1/4"
Height: 2-7/16"
COMMENTS: The instructions are on the box, along with the appropriate charging
times.
7.2V 8.4V
Charge Times: 1200mAh 19 min. 29 min.
1500mAh 20 min. 37 min.
1700mAh 24 min. 41 min.
This charges at a 5 Amp rate and is NOT recommended for charging
NiMH batteries. The charge rate is not adjustable on this model.
This is one of the lowest-priced chargers around. It is an AC/DC charger that
is perfect for the entry level setup. It safely fast charges 6- or 7-cell
batteries, then switches automatically to TRICKLE charge. Ampmeter shows
charge progress. This charger has a One-Year Warranty.
FEATURES: Safely fast-charges fully drained batteries in 20-40 minutes
Charge/Discharge switch lets the modeler make the appropriate
selection
Simple to use: set timer to 15 minutes ... built-in electronic timer
automatically switches to TRICKLE when knob is at O (zero).
AC input .8 amp fuse protected for safety (bus, glass tube type)
INCLUDES: One 6-7 cell charger w/connector that plugs into a Tamiya battery,
AC outlet plug and DC alligator clips all prewired.
One Kyosho battery adapter
One extra fuse
SPECS: Input Voltage: 110V AC US Standard
12V DC
Length: 6-3/4"
Width: 4-1/4"
Height: 2-7/16"
COMMENTS: The instructions are on the box, along with the appropriate charging
times.
7.2V 8.4V
Charge Times: 1200mAh 19 min. 29 min.
1500mAh 20 min. 37 min.
1700mAh 24 min. 41 min.
This charges at a 5 Amp rate and is NOT recommended for charging
NiMH batteries. The charge rate is not adjustable on this model.
04-09-2004, 08:23 PM
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RE: Charger question for the guys here
You can charge the batteries a 5 amp for (2 1500 mah cycles times) You should get a better charger. I have had the cheap charger and went threw them when I should have bought a good charger first and saved my money.A TEKIN 112c charger is what I have now and what I should have bought a long time ago.
04-10-2004, 09:15 AM
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RE: Charger question for the guys here
FlyingFish,
If these batteries are NiCDs, than no problem. Assuming these are not NiMH batteries than your charger will charge them. At 5 amp your looking at a little over 1/2 hour, the rule of charging is 1C for one hour, mean 1 x battery capacity = 1 hour.
So for your batteries of 3 amp hour capacity, the charge would be 3 amps for 60 minutes, or 6 amps for 30 minutes. You would be looking at a little over 1/2 hour which is a typical fast-charge rate.
Again, don't use this charger on NiMH, as the instructions say.
If these batteries are NiCDs, than no problem. Assuming these are not NiMH batteries than your charger will charge them. At 5 amp your looking at a little over 1/2 hour, the rule of charging is 1C for one hour, mean 1 x battery capacity = 1 hour.
So for your batteries of 3 amp hour capacity, the charge would be 3 amps for 60 minutes, or 6 amps for 30 minutes. You would be looking at a little over 1/2 hour which is a typical fast-charge rate.
Again, don't use this charger on NiMH, as the instructions say.
