G-Series 36V and Drive/Drive2 48V battery testing and replacement. Individual cell testing, replacement scheduling, and lithium conversion options.
Test each battery individually with the pack at full charge. G-series 36V: 6 batteries × 6V (should read 6.2–6.4V each). Drive 48V: 6 batteries × 8V (should read 8.3–8.5V each). Any battery more than 0.4V below the others under the same charge state is failing. If pack is over 5 years old and one battery is low, replace the full set.
If pack is under 3 years old, replace only the bad cell. If over 5 years, replace all 6.
Pack at end of life. Replace complete set. All Trojan or all Interstate — don't mix brands.
Load test: drive 50 ft, immediately measure each battery. Good cells recover; bad ones stay depressed.
G-Series electric (36V): 6 × 6V batteries in series. Common batteries: Trojan T-605, US Battery US2200.
Drive and Drive2 (48V): 6 × 8V batteries in series. Common batteries: Trojan T-875, Interstate GC8.
Never mix old and new batteries in the same pack. A new battery in series with degraded cells will be cycled outside its design range and typically fails within 6–12 months.
Lithium battery kits for 48V golf carts have dropped significantly in price ($800–$2,500 depending on capacity). Benefits: half the weight, no watering required, 10+ year life, and the lithium BMS (Battery Management System) provides better protection than lead-acid chemistry. The charger must be compatible with lithium — most 48V lithium kits come with or require a lithium-specific charger. Not all existing lead-acid chargers can be used with lithium packs.
| Battery Option | Cost (Full Set) | Life |
|---|---|---|
| Trojan T-875 (6×8V, 48V) | $560–$720 | 5–7 years |
| Trojan T-605 (6×6V, 36V) | $320–$480 | 5–7 years |
| AGM 8V (6-pack, 48V) | $480–$650 | 4–6 years, no maintenance |
| 48V Lithium kit | $900–$2,500 | 10–15 years |
OEM-spec deep-cycle 8V battery for Yamaha Drive 48V packs. Replace all 6 at once.
Check Price on Amazon → As an Amazon Associate, CartFix earns from qualifying purchases.Drop-in lithium conversion for Yamaha Drive/Drive2 48V. Lighter, longer life, no water required.
Check Price on Amazon → As an Amazon Associate, CartFix earns from qualifying purchases.