It is currently Mon Jun 26, 2017 12:22 pm



Welcome
Welcome to imhotep's labs

You are currently viewing our boards as a guest, which gives you limited access to view most discussions and access our other features. By joining our free community, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content, and access many other special features. In addition, registered members also see less advertisements. Registration is fast, simple, and absolutely free, so please, join our community today!


Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Is this battery available and safe in bedini fan charging
PostPosted: Thu Aug 25, 2011 12:27 am 
Offline

Joined: Sun Aug 21, 2011 12:29 pm
Posts: 46
Has thanked: 0 time
Have thanks: 0 time
Attachment:
Image13.jpg
Image13.jpg [ 27.94 KiB | Viewed 442 times ]

This is the Battery i had long ago, it doesn't charge (much) anymore using normal charging (the own circuit).
The picture is blur, so i will type out below :
Quote:
Sealed Lead Acid
Rechargeable Battery
6v, 4.5Ah
*Caution : DO NOT SHORT CIRCUIT*
Constant Voltage Charge
Voltage Regulation
Cycle Use : 7.2V-7.5V
Standby Use : 6.75V-6.9V
Max Charging Current 1.2A


So my main concern it is safe to charge ? (can it be revive is another matter, safety first)
I heard alot of people say lead acid is robust and perform best in these charging, is it true ?
OR is it better to find other batteries to use ? (going to delay my charging)


Top
 Profile Send private message  
 
 
 Post subject: Re: Is this battery available and safe in bedini fan chargin
PostPosted: Thu Aug 25, 2011 3:27 am 
Offline
Moderator

Joined: Wed Aug 13, 2008 11:48 pm
Posts: 1016
Has thanked: 0 time
Have thanks: 27 time
yes it is safe to charge but it sounds as if it is already dieing. Charge it to 7.5 volts, take it off and let it stand for an hour or two then measure the standing voltage, It should be in the range of 6.6 to 6.9v. Never allow the voltage to go much above 7.5, when charging, after 6 cycles of charge and discharge the battery should have mostly recovered. If the battery is drying out the voltage will rise rapidly but have no capacity. As a last resort you can pop off the vent cover and put 1 or 2cc of distilled water inside each cell. let it stand for a day and retry charging it. Gel cells have very little moisture inside them and overcharging them dries them out very quickly.


Top
 Profile Send private message  
 
 Post subject: Re: Is this battery available and safe in bedini fan chargin
PostPosted: Thu Aug 25, 2011 5:38 am 
Offline

Joined: Sun Aug 21, 2011 12:29 pm
Posts: 46
Has thanked: 0 time
Have thanks: 0 time
mbrownn wrote:
yes it is safe to charge but it sounds as if it is already dieing. Charge it to 7.5 volts, take it off and let it stand for an hour or two then measure the standing voltage, It should be in the range of 6.6 to 6.9v. Never allow the voltage to go much above 7.5, when charging, after 6 cycles of charge and discharge the battery should have mostly recovered. If the battery is drying out the voltage will rise rapidly but have no capacity. As a last resort you can pop off the vent cover and put 1 or 2cc of distilled water inside each cell. let it stand for a day and retry charging it. Gel cells have very little moisture inside them and overcharging them dries them out very quickly.

I guess i'm going to work on it after my exam and classes. Only have done wiring (or pole'ing) of my fan into 4 leads of wire, going to do the circuit tonight.

If it is dry... then i need to wait until weekend when i'm at my home with distilled water ^^
SO the information i stated really have some usage, is good that i didn't directly charge it without asking first.


Top
 Profile Send private message  
 
 Post subject: Re: Is this battery available and safe in bedini fan chargin
PostPosted: Sat Aug 27, 2011 5:34 am 
Offline

Joined: Tue Dec 23, 2008 1:44 am
Posts: 397
Has thanked: 6 time
Have thanks: 12 time
guitar89 wrote:
So my main concern it is safe to charge ? (can it be revive is another matter, safety first)
I heard alot of people say lead acid is robust and perform best in these charging, is it true ?
OR is it better to find other batteries to use ? (going to delay my charging)
not dangerous to you yes. But gel battery die quicker with radiant electricity.

I found adding alum can preserve them better.


Top
 Profile Send private message  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 


Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
suspicion-preferred