By Ken Jones, Owner at Flamingo Custom Carts
Published
Good lithium golf cart battery charging comes down to a few habits: use the charger made for your pack and its battery management system, charge within the temperature range the maker lists, plug into a proper outlet, and store the cart at the state of charge your manual recommends. Those habits protect the pack and help it deliver steady performance for years.
If you are still deciding whether to switch, start with our guide to converting your golf cart to lithium batteries. This post is for owners who already have a lithium pack and want to care for it well.
How Lithium Golf Cart Battery Charging Works
A lithium pack is not just a box of cells. It is a set of cells managed by electronics, and it works with a charger designed to communicate with or suit that pack. The charger supplies power, and the pack’s battery management system decides whether, and how fast, the cells can safely accept it.
That is why lithium golf cart battery charging is less about the charger alone and more about the charger, the pack and the BMS working together as a system.
What the Battery Management System Does
A battery management system, or BMS, is the pack’s built-in control circuitry. In general, a BMS monitors cell voltages, current and temperature, and it can limit or stop charging and discharging when conditions fall outside safe limits. The exact features vary by pack.
E-Z-GO’s owner’s manual for its Express S6 ELiTE lithium models describes it this way: the BMS and charger cooperate to make sure charging occurs at the proper rate, and the BMS adjusts the charge rate based on the temperature of the batteries. Other packs may work differently, so read the manual for yours.
7 Helpful Lithium Golf Cart Battery Charging Habits
These seven habits apply to most lithium packs. When your owner’s manual or battery maker gives different instructions, follow theirs.
1. Use the Charger Matched to Your Pack
Use only the lithium battery charger approved for your pack. The E-Z-GO manual, for example, tells owners to use only the OEM-approved lithium-ion charger for their vehicle. A charger made for lead-acid batteries, or for a different lithium pack, may not charge correctly and may not work with the BMS.
2. Charge Within the Maker’s Temperature Range
Temperature has a big effect on lithium golf cart battery charging, because lithium cells are sensitive to heat and cold while they charge. Very cold or very hot conditions can slow or block charging, and the BMS may refuse to charge until the pack is within range. Look up the charging temperature range in your manual, and in summer, avoid charging a hot cart in direct sun right after a long drive when you can.
3. Plug Into a Proper Outlet
Use a properly grounded wall outlet in good condition. The E-Z-GO manual tells owners to connect to a dedicated wall receptacle and not to use a multi-plug adapter or power strip. Keep the charger and cord dry, uncoiled and out of foot traffic.
4. Charge After Use if Your Maker Allows It
Many lithium packs do not need to be run down before charging. The E-Z-GO manual says its pack may be charged or topped off after every use. Check whether your pack’s maker gives the same guidance before you make it a habit.
5. Unplug When Your Manual Says To
Some makers want the charger left connected, while others say to disconnect it once charging finishes. The E-Z-GO manual, for instance, says to disconnect the charger cord from the vehicle when the pack is finished charging. Follow the instruction for your specific pack.
6. Store at the Right State of Charge
Lithium battery storage is where many owners go wrong. Do not assume full is best or empty is fine. Your manual will say what state of charge to store at, how often to check it, and whether a storage mode or switch should be set.
E-Z-GO’s manual, as an example, calls for a 30% to 50% charge for storage in hot climates, a full charge in cold climates, and a state-of-charge check every 30 days. Your pack’s numbers may differ.
7. Inspect Regularly and Recycle Properly
Look over the charging port, cord and battery compartment from time to time. Stop using the pack and have it checked if you see swelling, damage, burning smells or unusual heat. When the pack reaches the end of its life, recycle it properly, as covered below.
A Simple Everyday Charging Routine
Put the habits above together and lithium golf cart battery charging becomes a quick routine you barely think about:
- Park the cart in a dry, sheltered spot near a proper wall outlet.
- Turn the key off and set any switches the way your manual describes for charging.
- Check the cord and plug for damage, then connect the approved charger.
- Let the charger and BMS finish the cycle without interrupting it repeatedly.
- Disconnect or leave connected as your manual directs, and store the cord neatly.
If you add accessories such as lights or a sound system, they draw on the same pack. Consistent lithium golf cart battery charging matters even more on a cart that powers extras.
Signs Your Charging Routine Needs a Second Look
Lithium packs usually give steady performance, so changes are worth noticing. Pay attention if you see any of these:
- The charger shows a fault code or stops early again and again.
- Range drops noticeably compared with how the cart used to perform.
- The pack, cables or charging port feel unusually hot.
- The battery display or indicator behaves erratically.
Check your manual’s troubleshooting section first. If the problem continues, have the pack, charger and wiring checked by someone experienced with lithium systems rather than guessing at a fix.
Temperature Cautions
Georgia summers bring heat, and the occasional winter cold snap brings the opposite. Both can affect lithium golf cart battery charging and storage.
- Heat. Park in shade or a garage when you can, and let a hot pack cool before charging if your manual recommends it.
- Cold. The BMS may slow or stop charging when the pack is too cold. Charging in a garage can help.
- Storage. Store the cart in a dry, sheltered place within the temperature range your manual lists.
If the charger shows a fault or will not start, check the manual’s troubleshooting section before trying again. Repeated faults are worth having checked by someone who works on lithium systems.
End-of-Life Recycling
Lithium packs should never go in household trash or curbside recycling. The EPA’s guidance on used lithium-ion batteries explains that these batteries can become damaged or crushed in transport or sorting equipment and create a fire hazard, and that they contain valuable critical minerals.
EPA says large batteries, such as those in electric vehicles, should go back to the automobile dealer, shop or salvage yard. For a golf cart pack, ask the shop that installed it or the pack’s maker how they handle returns, or contact your local solid waste or household hazardous waste program. EPA also notes that used batteries can still hold enough energy to cause injury or fire, and that you should contact the battery or device maker for handling information if a battery is damaged.
Frequently Asked Questions
Can I use my old lead-acid charger on a lithium pack?
No. Use the lithium battery charger approved for your specific pack. A lead-acid charger is not designed for a lithium pack and its BMS.
Should I leave my lithium cart plugged in all the time?
It depends on the pack. Some makers say to disconnect when charging finishes, while others allow the charger to stay connected. Follow your owner’s manual.
What charge level is best for winter storage?
It varies by maker and climate. Your manual will list the storage state of charge, how often to check it, and whether to set a storage switch or mode.
Why won’t my lithium pack charge in cold weather?
The battery management system may block or slow charging when the cells are outside a safe temperature range. Let the pack warm up in a sheltered space and try again.
Get Help With Lithium Golf Cart Battery Charging
Flamingo Custom Carts, the custom build and upgrade shop of Golf Carts Atlanta, installs lithium battery upgrades as part of custom builds. Learn more on our lithium battery upgrades page, or visit 1680 Lower Roswell Rd, Suite 100, Marietta, GA 30068, Monday through Friday from 7am to 3pm.
Call (678) 436-2282 or contact us online with questions about your lithium pack, charger or upgrade.
