1 bad battery and red lite

[redman34]

Need advice on the following :

A club Car plate starts out as A97 so I assume it is a 97.

It is 48 volt, has six 8 volt trojen batteries, with date code E5.

Also has the computerized charger with the 3rd pin on it.

Red lite is on, on dash board. Owner noticed cart was loosing power. Cart has been sitting unused for awhile.

Charged batteries and drove about 9 holes of golf. Was loosing power on way home. After plugging charger in noticed red lite.

I took battery readings as follows :

8.38-8.38-8.40-8.41-6.20-8.43

Also took resistance readings, and they are all AWESOME EXCEPT the battery with the 6 volts on it.

The resistance readings on the good 8 volt batteries were :

7.78 7.37 6.99 7.63 7.69 A new battery has a resistance of 3.5, and golf courses get rid of the batteries after a reading of 12. So for such old batteries, these seem in great shape.

My question is, if i replace the one bad battery with a new battery, since the remaining batteries are in good shape, should this fix the red lite as well as get the pack functioning alright?

[golfcartg]

Typically, a fully charged 8 volt lead-acid battery will read around 8.4 volts. As batteries discharge, their voltage drops. For lead acid batteries, a voltage of around 7.2 volts for an 8 volt battery indicates a 50% state of charge. So, if you're seeing readings of 8.38 to 8.43 volts on most of your 8 volt batteries and 6.20 volts on one battery, it suggests that the battery with 6.20 volts is significantly discharged compared to the others. Based on this, if the resting voltage of the batteries you listed is below 7.2 volts, it indicates a state of charge below 50%. If the resting voltage readings align with typical values for a 50% state of charge or below, it suggests that these batteries may need to be recharged to restore them to optimal performance.

If the resting voltage readings of the batteries are consistently below the expected levels for a 50% state of charge, and if attempts to recharge them are unsuccessful, it indicates that these batteries may have reached the end of their service life. This situation is particularly concerning if the batteries are over 5 years old and haven't been adequately maintained during the off season. Batteries naturally degrade over time, especially if they're not properly maintained or if they've been in use for an extended period. As they age, their ability to hold a charge diminishes, resulting in decreased performance and reliability. If the batteries in question are exhibiting signs of damage or deterioration, such as low resting voltage despite charging attempts, it's likely time to consider replacing them all.

Replacing just one battery in a set is generally not recommended. This practice can lead to imbalances within the battery pack, as the new battery's capacity and performance may differ from that of the older ones. These discrepancies can cause uneven charging and discharging among the batteries, potentially compromising overall performance. Additionally, if the existing batteries are already exhibiting signs of low voltage, it's likely that the entire battery pack is nearing the end of its service life. In such cases, replacing the entire set with a matching, new set of batteries is the most prudent approach. Consider replacing the weakened battery with a known, reliable used battery, and continue using the golf cart until the remaining batteries reach the end of their lifespan.