What size SLA Charger do I use for 17Ah Batteries

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


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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  Timing Pulley Distance Between Centres Calculator  
  Large Pulley Teeth Number T  
  Small Pulley Teeth Number T  
  Pitch   mm  
  Belt Length   mm  
  Large Pulley PCD   mm  
  Small Pulley PCD   mm  
  Distance Between Centres mm  
  How to use the Pulley Distance Calculator  
  1. Enter the number of teeth on the largest pulley  
  2. Enter the number of teeth on the smallest pulley  
  Note: if 1:1 ratio, enter the same number of teeth in both boxes  
  3. Enter the belt tooth pitch in mm, i.e. T5 is 5mm, T2.5 is 2.5mm  
  4. Enter the belt length in mm  
  The resulting answer is shown in the bottom yellow box. For information, the PCD of the pulleys is also shown in the other yellow boxes.  
  In order to achieve the correct tension, one of the pulleys should be adjustable.  
  Disclaimer: Whilst we have taken evey care to ensure this calculator gives the correct answer, Technobots cannot be held responsible for any errors and their consequencies.