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Next Shipping Day 3rd December

We are now in the process of moving Technobots 120 miles North to the Town of Rugby. You can still place orders on-line as normal but they will not be dispatched until after we re-open on the 3rd December

Machining Services

Our machine shop is also being re-located so we are unable to carry out machining modifications on gears, sprockets, pulleys etc. Any order placed which includes machining options is unlikely to be processed until mid December.


What size SLA Charger do I use for 17Ah Batteries

Author Message
steveclark
Unregistered guest
Posted on Saturday, November 26, 2005 - 8:08 pm:    Edit Post    Move Post (Moderator/Admin Only)

I'm looking to use your MFA 12V 500mA SLA charger on a 17Ahr sealed battery. as there is no range of battery capacity stated, will this be ok with this size battery?
thanks,
Steve
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 94
Registered: 10-2004
Posted on Sunday, November 27, 2005 - 9:18 pm:    Edit Post    Move Post (Moderator/Admin Only)

Steve,

For sealed lead acid batteries, the maximum charging current must not exceed 25% of the Ah capacity. So, for a 17Ah battery, the maximum charging current must be less than 4.25A.

However, if the available charging current is too low in relation to the Ah capacity, the charging time will be long. At 500mA, it could take as long as 40 hours to charge a flat battery. It is also possible that too low a charging current will not even start the charging process on a deep discharged battery.

We would strongly recommend one of out Mascot 2.7Ah chargers 1070-001) that will fast charge the 17Ah battery and automatically switch to trickle charge so as not to damage the battery by over-charging. In fact, the charger can be left on trickle mode indefinitely thus ensuring the battery is kept at peak charge.

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