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amit_er1981
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Join Date: May 2009
Posts: 21

Battery Charging

10/13/2009 8:53 AM

i have 6 volt battey in emergency light but i would like to know i much maximum DC voltage is reguired for a chaging of 6 volt battery (6 volt, 4.5 Ah)
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Electroman
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#1

Re: battery charging

10/13/2009 9:25 AM

It would help if we knew what type of battery it is....

But besides that the first place to look is on the manufacturer's web site, or give them a call, they will know what you need to charge the battery.

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Doorman
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Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

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#2

Re: battery charging

10/13/2009 9:51 AM

The emergency lights I have seen are under a constant charge state (standby), until domestic power drops out; when power outage, the emergency light draws stored energy from battery, and provides illumination. This charging is thru transformer from domestic power, 120VAC... (sometimes 277VAC?). Are you not using the standby battery and emergency light in this fashion?

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Johny451
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Join Date: Aug 2008
Location: Melbourne, Australia
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#3

Re: Battery Charging

10/13/2009 11:21 PM

To keep a 4.5Ah lead acid battery on standby you would need 6.8 Volts REGULATED with up to 500mA current capability. Don't use a non-regulated charger/supply or the battery will over charge and dry out when it vents. Also take care as some regulated power supplies/plug packs don't like being fed voltage if they are turned off(no AC power to them).

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Previous in Forum: Squirrel Cage Electric Motor   Next in Forum: Wanted: EMI Testing Service
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