BNF Mini-CP battery charger under-charging. - HeliFreak
Fun, Learning, Friendship and Mutual Respect START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Walkera Helicopters > Mini CP


Mini CP Walkera Mini CP Helicopter Support


Reply
 
LinkBack Thread Tools Display Modes
Old 02-24-2012, 07:26 PM   #1 (permalink)
Registered Users
 

Join Date: Feb 2012
Location: Madison, Wisconsin
Default BNF Mini-CP battery charger under-charging.

My Mini-CP, w/o TX, came with a small dual battery charger but after charging to what the charger thinks is full, the batteries only measure about 4.17 to 4.18 volts, as measured on a Fluke multimeter.

But, after charging has completed on that charger, I put the batteries on the wall charger that came with my RTF V120D02S, which brings them up to a full 4.20 to 4.21 volts.

Does anyone else, with the same kit, see the same thing?

The charger does have screws in the bottom of it but it appears that they don't hold the top and bottom halves together because the top and bottom seem to actually be glued together, i.e. no user serviceable parts. :-( The screws just seem to be holding a circuit board in place.

It's a shame that it isn't fully charging batteries and apparently can't be adjusted because it is a sweet little charger even if it doesn't have all the buzzers whistles and bells of the more expensive chargers.
Heli-opolis is offline        Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 02-24-2012, 09:10 PM   #2 (permalink)
Registered Users
 

Join Date: Feb 2012
Location: City
Default

hmmm I use custom chargers? but mine hasnt come in yet, when it does ill use it and see what it says.
MilitaryMachinist is offline        Reply With Quote Quick reply to this message
Old 02-24-2012, 09:38 PM   #3 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Feb 2012
Location: Madison, Wisconsin
Default

I'd be interested to hear what you find out.

I plan on getting a better charger soon, probably a Turnigy or similar but for a charger, with a USB power source, that fits in a pocket, it's pretty convenient.

Other than the fact that it doesn't fully charge the batteries but whose to quibble over little things like that? ;-)
Heli-opolis is offline        Reply With Quote Quick reply to this message
Old 02-24-2012, 09:46 PM   #4 (permalink)
Registered Users
 

Join Date: Feb 2012
Location: City
Default

I use the Hitec X4. Can charge 4 batteries at a time, 1-6S and pump out 50W at 5A per charging port. Usually if I run 1amp though I get better results than if I say charge a 550mAh battery at 2.5 amps (probably has to do with the cell equalizing out and the charge moving across the cell in time).
MilitaryMachinist is offline        Reply With Quote Quick reply to this message
Old 02-24-2012, 10:53 PM   #5 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Feb 2012
Location: Madison, Wisconsin
Default

Wow! You didn't spare any Lincolns on that one! That's a sweet charger!
Heli-opolis is offline        Reply With Quote Quick reply to this message
Old 02-25-2012, 12:08 AM   #6 (permalink)
Registered Users
 

Join Date: Feb 2012
Location: City
Default

I have (if you include the 3 ordered helicopters that are "on the way") I have 14 helicopters. So I got kind of tired of having 14 different chargers lol. I have a cable with 8 different connections on one end. Then I have adapters to balance charge multiple single cells at a time. (I use two Hitec X4 chargers). I just got tired of having to unplug and plug in different charges, and to not be able to push one button and charge them up. Or to have to wait for charging to complete. I can fly non stop with this system. Say I am flying and have stagger started batteries, I could actually fly for hours with only breaks to change batteries.
MilitaryMachinist is offline        Reply With Quote Quick reply to this message
Old 02-25-2012, 03:00 PM   #7 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Feb 2012
Location: Madison, Wisconsin
Default

No argument about not wanting to be buried under a mountain of different chargers.

Besides that, it seems reliability of different chargers varies so spending the money for something decent is the way to go. Not that I've had a 'bad' charger, per se, just that they don't always charge to the levels they should or control voltage/current as more expensive feature-rich chargers do.

Add to that, the wall warts and various other included chargers don't display information like voltage, current or the amount of energy transferred and without the last, one can never really know how long a given batteries expected life span is or even how long one should fly on it.

I wish one could order kits and specifically select to NOT have a charger included.

On the other hand, you can tie a bunch together with the cords and use them hunting as a bola.
Heli-opolis is offline        Reply With Quote Quick reply to this message
Old 02-25-2012, 04:28 PM   #8 (permalink)
Registered Users
 

Join Date: Feb 2012
Location: City
Default

I use it to tune precise flight times. I have one of my helicopters I fly to within 5mAh of the battery capacity on the timer. Also to put batteries in storage mode.
MilitaryMachinist is offline        Reply With Quote Quick reply to this message
Old 02-26-2012, 08:41 PM   #9 (permalink)
Registered Users
 

Join Date: Dec 2011
Location: Tokyo, Japan
Default

At the low end there is the accucel 6 http://www.hobbyking.com/hobbycity/s...idproduct=7028

I only fly micros and this thing is pretty sweet for the price. With daisy-chained pigtails I can parallel charge 11 lipos simultaneously.

It may not be the most accurate, but my lipos are loving it after many many cycles. I threw away the stock wall chargers as they puffed up a few packs after only a few cycles.
bytemuncher is offline        Reply With Quote Quick reply to this message
Old 02-26-2012, 08:48 PM   #10 (permalink)
Registered Users
 

Join Date: Sep 2011
Location: South Korea, Shihung (South of Seoul)
Default

The charger that came with my old Walkera v400 wasn't so bad. Its only 2-3 cell at 850mah, but it did such a good job I got 4 of them and connected them into a lcd monitor power brick as the slow balancing part of my portable charging system. By themselves rtf chargers aren't that great, but they are cheap and have their uses. Also by replacing the wall wart power supplies with something like a power brick you can run a bunch of them off one plug.
krobinson103 is offline        Reply With Quote Quick reply to this message
Reply




Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Location
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




Copyright © Website Acquisitions Inc. All rights reserved.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
 

SEO by vBSEO 3.6.1