Lester Electrical is dedicated to enhancing the customer experience by providing excellent technical support. We want to help you get the most out of your battery charger. Please explore our service and support page and find video guides, FAQ’s and technical bulletins. These documents are provided to answer our most commonly asked questions and provide product use tutorials and installation guides.

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The Lester Electrical technical support department answers calls and emails on a variety of topics in the course of a day. Frequently asked questions & answers are available on this page. If you have an idea you would like to see written, please email us at

Motive Power

  • How does “storage mode” work?
    • “Storage Mode” is a feature that comes with all  Lester Electrical E-series, E-Series II, Summit and Summit II golf cart battery chargers.  Once a manual charge session is complete,  the charger goes into its “storage mode” feature when it remains connected to the golf cart and the AC Plug remains plugged into the wall. When in storage mode, it will charge your batteries only when the following two situations occur (1) the battery voltage drops to a certain predefined voltage AND (2) 10-15 days have elapsed.
  • How do I connect the Lester on-board charger to my vehicle  batteries?
    • The positive wire from the charger must be connected to the first positive(+) terminal of the series battery pack (Battery #1), and the negative (-) wire must be connected to the last negative battery terminal of the circuit
  • Can I use my charger (or the Lester chargers) with a  GFCI outlet?
    • Yes, Lester Electrical chargers have controlled current production so they can be used in application where the AC power sources is controlled by a GFCI wall output
  • Can I swap out plugs on my 36V or 48V charger?
    • The DC output plugs used by Lester Electrical have different current ratings, so its important to install a DC Cordset that is rated for the current that can be produced by the Lester Charger.  Contact Lester Technical Support for DC Cordset current ratings before swapping DC Plugs
  • What if my batteries’ voltage is too low, can they still be charged?
    • There is a minimum start voltage for all Lester Chargers.  Lestronic 2 chargers require a DC Battery voltage of at least 70% of the rated voltage to initiate a charge sequence.  Newer designed chargers such a Summit or E-Series require approximately 15 VDC for startup
  • Can I leave my charger plugged in for long periods of time?
    • Yes,  the Lester Electrical Battery Charger can remained plugged into AC power for extended periods of time.  It is a good idea to use an AC Outlet surge suppressor if the charger will be left unattended for long periods of time
  • Does my charger automatically stop charging once the batteries are fully charged?
    • Yes,  All Lester Automatic battery chargers will terminate the charge sequence when the batteries being charged have met 100% capacity
  • Should the  charger make noise while charging?
    • Ferroresonant and SCR Chargers  all use a transformers  to produce the current required to charge batteries, so when these types of chargers are producing current, you will hear a low level “buzz” emitting from the charger.  Summit and Summit II Chargers are “High Frequency” chargers that do not use transformers, so the LED Lights are used to verify proper operation
  • Why is my battery charger showing a red flashing light?
    • Red Flashing lights indicate a fault has occurred during the charge cycle.  Quick Flashing (multiple  flashes per second) are less critical than slow flashing (once a second) .  If the charger is flashing a slow red light, it has terminate the charger cycle and further troubleshooting steps are required
  • How do I find the owners manual for my charger?
    • All manuals for Lester Chargers are available on our public website.  It may be easier to search for this information using the Charger Series type (Summit II, E-series, etc.)
  • How long does it take to charge a golf cart?
    • Depending on the state of battery discharge, it can take ups to 13 hours to fully charge a set of batteries
  • Should I charge the golf cart after each use?
    • For extended battery life, the  golf cart batteries should be charged after every use
  • Should I charge the golf cart in “Run” or “Tow”?
    • Your batteries should always be charged with the cart in “Run” Mode.. Your golf cart should be switched to “Run” anytime you are using the cart or charging your batteries. “Tow” is only for long term storage (if you are planning to remove the batteries)
  • Can I use a 36 volt charger on a 48 volt golf cart?
    • No, a charger rated at 36 volts will not charge a vehicle that is designed to run on 48 volts.  If a 36VDC charger is connected to a 48 volt cart, the charger will display an “under voltage” error within 10 minutes.  
  • Where on the golf cart do I install a Lester onboard battery charger?
    • Lester onboard chargers are typically installed within the battery compartment of golf cart, however, if space inside the compartment is limited, the charger can be installed in the tray behind the seats or in the compartment behind golf club holders.  
  • How many battery profiles will my charger are programmed into my charger?
    • All E-Series II chargers include (2) pre-selected battery profiles.  The model number of the charger indicate which charge profiles are available.  Consult the users manual for information regarding pre-programmed battery profiles
  • How do I change the battery profile in my charger?
    • Battery profiles may be changed by re-positioning an internal jumper.  Remove  the grey rubber cover from the front of the charger and locate the 3 pin connector below the larger 6 pin.  For the charge profile in position 1, the jumper must be installed between the 2 pins to the right, for battery profile 2, make sure the jumper is positioned between the two pins to the left.  
  • There are flashing lights on my charger, what do they mean?
    • The LED Lights on your charger indicate the charge status, complete charge or any faults that may have occurred during a charge cycle.  Please see the E-Series  II users manual for a complete list of these LED light codes
  • Can I change the DC Cordsets installed on my charger?
    • No, the DC Cordsets on E-Series II Chargers need to installed by a trained technician
  • Can the charger use 120 /240 VAC?
    • E-Series II chargers are intended to be used with 120 VAC only
  • Can I charge lithium batteries with a E-Series/Links Charger?
    • Yes,  The standard Wet Cell battery profiles are used (IEI) and the maximum voltage is regulated by the lithium battery controller that is part of your  power cell package
  • What is the difference between onboard and shelf mode charger settings?
    • Onboard chargers initiate the charge sequence when AC voltage is detected by the charger.  Shelf mode charger require the detection of DC voltage to initiate the charge
  • Is my 48 volt Club Car on-board computer (OBC) malfunctioning?
  • Are there specific chargers that will only work with my Club Car Vehicle?
    • The 26610-21 Is the only aftermarket charger that will work with a Club Car cart with  an active OBC
  • How do I choose a replacement charger for my Power Drive Charger?
  • What is an OBC By-pass kit?
    • The OBC By-pass kit de-activates the carts OBC, so a standard charger can be used to charge batteries and Club Cart cars
  • How do I tell if I have a Precedent or DS Cart?
    • Club Car Precedent and DS Carts have different battery connections for charging the battery, the difference can only be viewed on the backside of the connector.  A DS Cart will have a fuse located within the connector, while a Precedent has wires directly connected to the connector housing
  • Do I have 6v, 8v or 12v golf cart batteries
    • The batteries in your vehicle should be clearly marked with your voltage output, but for wet chemistry batteries, count the number of water fill hole at the top of the battery.  6 volt batteries have 3 fill holes, 8 volt have 4, and 12 volt have 6
  • What is a series battery circuit?  
    • A series battery circuit is laid out where the negative (-)  terminal of a battery is connected to the positive (+)  terminal of the next battery, then the negative of that battery is connected to the positive of the following battery.  This sequence continues until all batteries are connected in this sequence.  The voltage of all connected batteries can then be added together to determine the complete pack voltage of the connected batteries
  • What is the difference between Wet-Cell & AGM Batteries?
    • Conventional, wet lead-acid batteries require a constant current finish at the end of the charge cycle. Using a charger designed for sealed/maintenance-free type batteries on conventional wet lead-acid batteries will cause increasingly shorter run times and possible loss of battery life due to undercharging. Gel/sealed lead-acid and AGM types of maintenance-free batteries require a constant voltage finish at the end of their charge cycle. Using a charger designed for conventional wet lead-acid batteries on these types of maintenance free batteries will result in loss of battery life and capacity due to overcharging.

Stationary Power

  • Are there dry contact alarm outputs for remote communication?
    • Yes, the connections to the alarm outputs are accessible on the UIM.  They can either be programmed using the rotary switches on the UIM or through the remote Ethernet connection
  • How can I download the logs from my charger?
    • Yes, the charge logs can be downloaded through either a direct or remote Ethernet connection to the charger
  • What are the LED’s on the IPM’s indicating
    • The LED’s on the IPM are used to display charge status and any alarm conditions that may occur.  Please see the user manual for additional explanations
  • What is an UIM?
    • The User Interface Module (UIM) is the main control center of the charger.  It is an integral piece of the main cabinet that contains the external communication devices and manual programming rotary switches
  • What is an IPM?
    • The Intelligent Power Module (IPM) is the replaceable power module.  The HF Max charger can hold up to 8 IPMs
  • Can I “Hot Swap “ the IPM’s on my charger?
    • “Hot Swapping” refers to the exchange of IPM Modules without removing power to the charger unit.  The IPM’s of the Atlas Charger can be removed without removing power to the entire unit
  • If my charger has 8 slots for IPM’s, can I install only six?
    • Yes,  Each IPM
  • What is the maximum distance my charger can be from my batteries?
    • The maximum distance is determined by gauge of the wire used to make this connections.  Please consult the users manual for additional information on maximum cable lengths
  • Can I remotely program my charger?
    • Yes, the charger can be remotely programmed  through a web enabled Ethernet connection
  • What is an UIM?
    • The User Interface Module (UIM) is the main control center of the charger.  It is an integral piece of the main cabinet that contains the external communication devices and manual programming rotary switches
  • What is an IPM?
    • The Intelligent Power Module (IPM) is the replaceable power module.  The HF Max charger can hold up to 8 IPMs
  • Can my Atlas Charger be integrated into my SCADA System
    • Yes, Atlas Charger can communicate to SCADA platforms via the Ethernet connection using SMP communication protocols


The Lester Electrical team focuses on providing quality products for our customers. If you have questions or comments on our chargers not answered above, we are here for you. Please call or e-mail us for additional support from one of our experts.

High-tech meets the Heartland


Recall Notification

Links Series chargers models 28080, 28090 and 28100

Links Series Field Action

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