HobbyKing.com New Products Flash Sale
Closed Thread
Thread Tools
Old Apr 19, 2009, 03:57 AM
Registered User
Brisbane, QLD, Australia
Joined Sep 2007
303 Posts
Question
Zip charging - getting my head around using a dedicated battery for this...

Hi,



Just a question about Zip Charging - I have already built a Dan's Charge Cut-off circuit, and plan to put about 2000mA back into the 3s batteries.



If I get an 18Ah 12V SLA battery, how many times can I charge the 3s packs before I get to a safe low voltage with the SLA that I have to stop?



A guess would be 8 - because I take the 18/2 which gives 9, and leave another 2A as a safety buffer for the SLA.



Am I thinking this out right? OR would I get more? Or less?



I've heard of people using their car batteries, I've only got a small car and worried that I will charge till I can't start. (but maybe with a few A123 packs I could start the car LOL)



I'm probably going to build a 12v safety cutout circuit if I use a large SLA battery and can get a decent amount of charges out of it. That way I can run the battery down to a pre-set limit. But is it worth investing in an 18A 12V SLA battery to take to the field or will this only give me less than 10 charges?
deswong is offline Find More Posts by deswong
Last edited by deswong; Apr 19, 2009 at 08:50 PM.
Sign up now
to remove ads between posts
Old Apr 19, 2009, 07:43 PM
Pompano Hill Flyers
Miami Mike's Avatar
Miami Lakes, Florida, USA
Joined Mar 2003
8,481 Posts
This is cross-posted to the Batteries and Chargers forum.
Miami Mike is offline Find More Posts by Miami Mike
Closed Thread


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Am I getting in over my head? Spawndn72 Electric Sailplanes 2 Oct 07, 2008 07:29 PM
Discussion using a lipo battery for the dx7 nashiem Batteries and Chargers 11 Jul 15, 2008 12:12 AM
Discussion Trying to get my head around this realjumper Batteries and Chargers 17 Jun 12, 2008 08:19 AM
Getting a Eco 8, am I in over my head? newracer Electric Heli Talk 11 Apr 05, 2004 12:42 AM
using laptop lipo battery for corona Elicopter Batteries and Chargers 5 Oct 08, 2003 11:53 PM