Why does my battery behave like this?

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Discussion Overview

The discussion revolves around the behavior of a sealed lead acid (SLA) battery pack during charging and discharging. Participants explore the implications of charging voltages exceeding recommended levels and the effects of drawing high current from the battery pack.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that during charging, two cells in the battery pack exceed the healthy voltage limit, while the other two remain within acceptable levels.
  • Another participant suggests that charging the SLA batteries at 16A could potentially damage them and recommends limiting charging time and monitoring voltage.
  • A clarification is made regarding the distinction between charge current and drain current, indicating that the maximum charge current should be around 2A.
  • One participant expresses that drawing 16A from the pack may not damage the batteries, despite the short duration of use (approximately 1/2 hour).

Areas of Agreement / Disagreement

Participants express differing views on the potential damage to the battery pack from both high charging currents and high discharge currents. There is no consensus on whether drawing 16A will harm the pack.

Contextual Notes

Participants discuss the implications of charging voltages and current limits without resolving the underlying assumptions about battery health and performance under specific conditions.

david90
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I have four 4 volts SLA and when I charge it, the two cells in the middle voltage goes up above 5 volts which is way pass the healthy charging voltage. The other two cells voltages stay at 4.8 which is good.


The pack is rated at 16v 8 aH. If I draw 16amp, will it hurt the pack?
 
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your sealed lead acid batterys are 4V each, if you charge them at 16A ,i believe they may in fact be damaged.. you should limit the time they are charging..and test the voltage periodically...
 
"If I draw 16amp, will it hurt the pack?"

If the drain current is 16amp not charge current. it is a different question. Charge current is around 2 amp max
 
The pack is rated at 16v 8 aH. If I draw 16amp, will it hurt the pack?
They will only last 1/2 an hour ,but i don't think it will hurt them , no..
 

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