The Bolt Energy 48V 105Ah Thin is a complete lithium iron phosphate (LiFePO4) conversion kit for the Yamaha G19 (1996–2002) and Yamaha G22 / G-MAX (2003–2007). One battery replaces all six of your lead-acid batteries, includes everything needed to complete the swap, and is backed by a 12-year manufacturer warranty. The Thin is built specifically for the long, narrow battery tray found in the G19 and G22 the correct form factor for these models.

Here is what actually changes the day after you install it:

• Six heavy, corroded batteries come out one sealed unit goes in their place
• Your cart loses roughly 100 lbs of dead weight you feel it the first time you press the pedal
• Hills that used to slow you down, you now climb without losing speed
• The cart runs at the same power level from the first mile to the last no fade as the charge drops
• You plug in one cable at the end of the day and walk away no watering schedule, no terminal cleaning, no equalization charges ever again
• Your phone shows you exactly how much charge is left no more guessing from a dash gauge that barely moves
• You stop budgeting for a replacement battery set every 3–5 years

That is the real outcome of switching to lithium. Everything below explains how it works and whether it is right for your G19 or G22.

Who is this battery best for?

• G19 or G22 owners whose lead-acid batteries are aging, failing, or due for replacement
• Owners who want more range, better hill performance, or a lighter, more responsive cart
• Anyone tired of the maintenance routine watering, cleaning terminals, watching water levels
• Owners in cold climates who need a battery that can charge in a freezing garage or outdoors (heated option)
• Anyone planning to keep their G19 or G22 running for years and wants one battery purchase that outlasts multiple lead-acid sets

Two kit tiers. One heated upgrade option. The Standard Kit includes the battery, charger, SOC meter, and hardware. The Professional Kit adds a 400A solenoid, 2-gauge cables, and a 30A DC-to-DC reducer for 12V accessories recommended for most G19 and G22 conversions. The heated version is available on either kit tier for cold-climate charging.

Why Switch to Lithium?

Your G19 or G22 originally came with six 8V lead-acid batteries. They work but they require maintenance, lose performance over time, and need replacing every few years. Here is an honest comparison:

The honest math: A replacement set of six 8V lead-acid batteries for a G19 or G22 runs $600–$900 and lasts 3–5 years before performance drops enough to replace them again. Over 12 years the length of Bolt's warranty you would replace that lead-acid set 2–4 times. One lithium kit, installed once, covers the same period with better performance the entire time.

Key Benefits

• One Battery Replaces Six
  Your G19 and G22 originally ran on six 8V lead-acid batteries wired in series to make 48V. The Thin replaces all six with a single sealed pack. One installation, one charger, one connection. Simpler and cleaner than anything lead-acid requires.
• About 100 lbs Lighter
  Six 8V lead-acid batteries combined weigh well over 200 lbs. The Thin weighs 100.8 lbs. That weight comes out of the rear of the cart and the difference shows up immediately quicker acceleration, better handling, less frame stress, and noticeably better hill climbing.
• Flat Voltage = Consistent Power Start to Finish
  Lead-acid voltage drops steadily as the pack drains your cart loses torque and slows down as the charge falls, especially on hills. LiFePO4 voltage stays nearly flat from roughly 90% down to about 20% charge. Your cart performs the same throughout the ride, not just when the batteries are fresh.
• 30–50 Miles Per Charge
  Range depends on load, terrain, speed, and tire pressure. Most G19 and G22 owners coming from aging lead-acid see a meaningful jump in usable range. Use Bolt Energy's Distance Calculator at boltenergyusa.com for an estimate based on your setup.
• Zero Maintenance for the Life of the Battery
  No water to add. No terminals to clean. No equalization cycles. No acid to manage. The battery is completely sealed and requires nothing between charges for its entire service life.
• 12-Year Warranty | 6 Years Full Replacement
  Years 1–6: full replacement at no cost on verified defects. Years 7–12: prorated. Register at boltenergyusa.com within 30 days of purchase to activate.
• Bluetooth Monitoring + OTA Updates
  The free Bolt app connects to the built-in Bluetooth receiver and shows state of charge, cell voltages, temperature, and fault codes in real time. BMS firmware updates over the air no hardware swaps needed.
• IP66 Powder Coated Steel Enclosure
  Built to IP66 standard handles rain, wash-down, and outdoor exposure without damage to the case or internal components.

What's in the Kit

Both kit tiers include the same Thin battery. The Professional Kit adds the components most G19 and G22 conversions require.

Which kit is right for your G19 or G22?
For most conversions: Professional Kit. The solenoid should be replaced on any lithium conversion. The 2-gauge cables handle lithium's discharge better than factory wiring. The 30A DC-to-DC reducer is required if your cart has lights, a horn, USB ports, or any 12V accessories. The Standard Kit works only if your solenoid is recently replaced and your cart has zero 12V accessories.

Compatibility

The Thin is the correct form factor for Yamaha G19 and G22 carts, which use a long, narrow battery tray designed for six 8V batteries in a row.

Why the Thin and not the Square?
The G19 and G22 use a long, narrow battery tray originally designed for six 8V batteries arranged in a single row. The Thin (20″ × 8.43″ × 10.65″) matches this tray. The Square (12.8″ × 12.01″ × 10.42″) is built for the grouped tray in the G29/Drive and Drive2. Identical specs and performance only the shape differs. Ordering the wrong shape means a fitment problem. Not sure which tray your cart has? Contact us before ordering.

Have a Yamaha G29/Drive or Drive2? Those models use the Square battery, different tray shape, same specs. See the Yamaha G29/Drive/Drive2 page →

Important, confirm your voltage before ordering: Some early G19 and G22 models came in a 36V configuration. This kit is for 48V systems only. G1 through G16 Yamaha models are 36V and require the 38.4V Classic battery not this product. Check your cart's spec label or contact us if you are unsure of your voltage before ordering.

Controller compatibility: The G19 and G22 use a GE SepEx 48V DC controller (300A stock). This controller is compatible with the Thin's 51.2V nominal voltage no reprogramming needed for stock setups. If your cart has an aftermarket controller, confirm lithium voltage compatibility with that manufacturer before ordering.

Installation

Most stock G19 and G22 conversions take 1–3 hours with basic hand tools. No welding, cutting, or controller reprogramming required for stock carts.

What the install involves:

• Remove all six 8V lead-acid batteries (the lead removal strap in the Pro Kit makes this easier)
• Mount the Thin using the included bracket it fits the long narrow tray in the G19/G22
• Connect the main cables and terminal connectors
• Install the SOC meter and Bluetooth receiver
• Address the charger interlock wiring reconnect the small red and black wires from the old charge port to battery positive and negative so the control system gets the signal it needs to run (covered in the installation instructions)
• Replace the solenoid (Pro Kit includes a 400A unit)
• Install the DC-to-DC reducer if your cart has 12V accessories (included in Pro Kit)
• After the swap, always cycle the Tow/Run switch flip to Tow, wait 30 seconds, flip back to Run before the first test drive

If you are not comfortable with the wiring steps, a local golf cart dealer or technician can complete the installation. We are available by phone or chat if you have questions during the process.

Performance

Here is what G19 and G22 owners typically notice after switching to the Bolt Energy Thin:

• Faster off the line. Removing 100+ lbs of dead battery weight reduces the total load the motor moves. Most owners feel the difference on the first drive.
• Stronger hill climbing. LiFePO4 delivers consistent amperage under load. Lead-acid voltage sags when the motor pulls hard on hills this means slowing down. Lithium does not sag the same way.
• No slowdown as the charge drops. Lead-acid performance degrades in the bottom third of the charge. LiFePO4 stays flat the cart performs the same at 30% charge as at 90%.
• More usable range. The flat discharge curve means more of the rated 105Ah is actually usable in normal driving conditions.
• Will it make my cart faster? Top speed is set by your controller. Lithium improves how you get to that speed and how consistently you maintain it under load. For higher top speed, a controller or motor upgrade is a separate modification.

Cold Weather

The standard Thin cannot charge below 34°F (1°C). The BMS blocks charging to protect the cells. You can still drive the cart in cold weather only charging is restricted.

If your G19 or G22 charges in an unheated space that drops below freezing, choose the heated version. Here is exactly how it works:

• Plug in the charger as normal
• If the battery is below the charging temperature threshold, the internal heater activates automatically and warms the cells from the inside
• Once the battery reaches approximately 34°F, the heater shuts off and normal charging begins no switches, no manual steps
• The heater only runs while the charger is plugged in zero power draw while driving or unplugged
• Plug in at night in a cold garage it warms itself, charges fully, and is ready in the morning

Both versions have identical charge and discharge specifications. The only difference is the self-heating capability. If you are in a mild climate or store your cart in a heated space, the standard version is the right choice.

Bluetooth & Monitoring

Every Thin includes a built-in Bluetooth receiver and a Smart SOC meter. Here is what you get:

• Bolt Mobile App (iOS + Android free): Real-time state of charge, individual cell voltages, pack temperature, and fault codes.
• Over-the-Air BMS Updates: Bolt pushes firmware improvements directly to your battery through the app no hardware changes, no shipping anything.
• Remote Diagnostics: Bolt technicians can read the app data to diagnose most issues without a shop visit.
• CAN Port: Secondary communication port for dealer and technician-level diagnostics.
• Smart SOC Meter: Replaces the stock dash gauge, which reads lead-acid voltage curves and is not useful on lithium. The SOC meter is calibrated for LiFePO4 and shows actual remaining charge.

FAQ

Specifications