40r Battery Alternative: [Battery Size That Can Be Considered]

Knowing the exact BCI group battery size aids in searching for a new battery replacement; however, knowing the BCI group size alone is frequently insufficient. Batteries are also distinguished by their intended use, whether it is a beginning, dual-purpose, deep cycle battery. The kind of cell, whether it’s an AGM, gel cell, flooded cell, or any other. Its chemistry, whether lead-acid, lithium, etc.

Details such as terminal number, kind, orientation, battery maintenance, housing material, and so on are also crucial. Knowing all of this information makes it much easier to select the right battery replacement.

The same case with choosing a battery replacement or an alternative for a 40r battery, ensure that the new one has the same chemistry as the old one (or is a validated “drop-in replacement”) and has the same or superior electrical features. The best alternative for the 40r battery is the 90r battery.

40r battery alternative40r battery alternative

The 40r battery is replaced with another battery as long as the other battery’s sizes and features are compatible. Many BCI battery groups differ by only a few millimeters and can be interchanged if and only if the new battery:

  • It can fit properly orientated connectors in your battery compartment
  • with better or the same as the old battery
  • can be charged appropriately

Even then, consult professionals to see if switching to a different battery group is a safe alternative. If not, the new battery’s functioning may result in damage, injuries, or even death.

Except for two models, BCI Group 48 and BCI Group 49, the majority of the battery groups have extremely similar dimensions.

BCI Group 48 batteries, for example, have physical dimensions of 306 x 175 x 192 mm, and the positive terminal is located on the right. The BCI Group 48 batteries are equivalent to the DIN/EN battery groups H6, L3, and 66L3, with physical dimensions of 278 x 175 x 190 mm and a positive terminal placement of right.

On the other hand, BCI Battery Group 98R batteries have physical dimensions of 283 x 175 x 190 mm and a positive terminal location of right, making them a better match for the DIN/EN battery groups H6 L3 and 66L3. Furthermore, the BCI Group 49 battery is 27 mm (just over 1 inch) longer than the “normal” DIN/EN H8, L5, 88L5 battery.

Always check the exact battery size and measure your battery compartment when replacing your battery on your own. Check the battery’s orientation, terminal kinds, and so on.

Battery size article that can be considered when looking for the 40r battery alternativeBattery size article that can be considered when looking for the 40r battery alternative

  • Trojan t 1275 w150pxBCI Group GC12 Batteries

12 Volt Golf Cart Batteries Group GC12 batteries are deep cycle, heavy-duty batteries made for automotive, and light industrial work that require powerful and stable energy sources.

GC12 batteries are also known as 12V golf cart batteries, although they’re also utilized for trolling motors, RV house batteries, power inverter batteries, medical and security systems, and so on.

  • 8 Volt Golf Cart Batteries, Group GC8, and Group

GC8H Trojan t 875 w150pxBCI Group GC8 and Group GC8H batteries are similar to GC2 and GC2H batteries in that they are heavy-duty, deep-cycle batteries. BCI Group GC8 and Group GC8H batteries are commonly used as deep cycle batteries in golf carts. Still, they can also be found in marine applications, off-grid applications, medical and security systems, and other applications.

  • 6 Volt Golf Cart Batteries BCI GC2 and GC2H Groups

Group GC2 and Group GC2H batteries are heavy-duty, deep-cycle batteries typically seen in golf carts and other vehicles. They’re also commonly utilized as deep cycle batteries in marine applications, off-grid applications, medical and security systems, and other similar applications.

GC2 and GC2H batteries are sometimes sold as 12V batteries (usually lithium 4-cell batteries) for constructing 24V, 36V, and 48V battery packs with fewer batteries, even though they are by definition 3-cell 6V batteries.

Types and Chemistry of GC2 and GC2H Batteries

Types and Chemistry of GC2 and GC2H Batteries
source: https://www.golfstorageguide.com/
  •  235 gc2 Vmax xtr6

Most GC2 batteries are 3-cell 6-volt lead-acid batteries, while 4-cell 12-volt Lithium Iron Phosphate (LiFePO4) batteries are also available.

Lead-acid GC2 batteries are traditionally heavy-duty, deep-cycle wet/flooded batteries; because they must frequently cycle during usage, they are built with heavy, thick plates that can commonly endure 1000+ cycles down to 50% DoD is an exceptional result for lead-acid batteries.

Wet lead-acid batteries, on the other hand, are not maintenance-free and are being phased out in favor of spill-proof, maintenance-free AGM and Gel-Cell lead-acid batteries. However, wet/flooded lead-acid batteries are still available.

  •  AGM and Gel-Cell batteries

They are frequently designed to allow up to, and occasionally even more than, 99 percent of created oxygen and hydrogen to recombine into the water and hence do not require periodic checkups.

However, when it comes to the number of charging/discharging cycles supported, wet/flooded GC2 batteries still have the upper hand.

  • Lithium Iron Phosphate (LiFePO4) GC2 batteries

They have a cycle life of 3000-4000 cycles and a DoD of 90-100 percent. They also have other advantages, such as:

  • Considerably lighter battery pack (30-50% lighter than identical lead-acid battery packs), resulting in weight savings and less strain on motors and batteries in general.
  • Quicker recharge than traditional lead-acid batteries
  • More consistent output voltage
  • They’re maintenance-free batteries that are installed in any location.
  • They do not emit any gases
  • A very low rate of self-discharge, and so on.

On the other hand, lithium batteries are initially more expensive, but they save money and time in the long term.

Number of Batteries Required:

The quantity of batteries required is determined by the voltage required:

  • 12V systems: 2 (two) 6V batteries or 1 (one) 12V battery
  • 24V systems: 4 (four) 6V batteries or 2 (two) 12V batteries
  • 36V systems: 6 (six) 6V batteries or 3 (three) 12V batteries
  • 48V systems: 6 (six) 6V batteries or 2 (two) 12V batteries
  • 48V systems: 6 (six) 6V batteries or 2 (two) 12V batteries;
  • 48V systems require either 8 (eight) 6V or 4 (four) 12V batteries.

When connecting lead-acid batteries in series or parallel, it’s best to use identical batteries from the same manufacturer, if possible from the same batch.

Lithium GC2 Batteries vs. Lead-Acid Batteries

We’ve previously discussed the benefits and drawbacks of lead-acid and lithium GC2 batteries. Still, we need to create one more exampLithium GC2 Batteries vs. Lead-Acid Batteriesle to illustrate the similarities and contrasts between these two battery kinds.

We’ll compare ‘vintage’ Trojan T-105 flooded lead-acid batteries with VMAX LFPGC-12175XTR lithium batteries in this example, with both batteries wired in series to make a 48-volt golf cart battery pack:

Battery count: 8 (eight) Trojan T-105 batteries, 4 (four) VMAX LFPGC-12175XTR batteries

When connecting lithium batteries in parallel and series, always use the same batteries from the same manufacturer, preferably from the same batch, IF, and ONLY IF such connections are allowed and mentioned by the lithium battery manufacturer!

The battery pack weighs 512 pounds (232 kg). Trojan T-105, 70 kg (154 pounds) – 358 pound (162 kg) weight loss

186 Ah Trojan T-105, 175 Ah VMAX LFPGC-12175XTR, rated capacity @25A. When the current draw is increased, the Trojan T-105’s actual capacity is reduced significantly more quickly.

Rated capacity: With an average output of 3.4-3.7 kW, the Trojan T-105 battery pack can produce 75A for 115 minutes (almost two hours). VMAX LFPGC-12175XTR battery pack can deliver 75 amps for somewhat more than 2 hours – VMAXTANKS does not disclose a precise amount.

The VMAX LFPGC-12175XTR battery pack can supply 100A and 350A for 3 seconds in a row, with the maximum output power of such a battery pack being 350A.

Number of charging/discharging cycles: The VMAX LFPGC2-12175XTR battery can withstand up to 4000 cycles down to 90% DoD (@35A, 25°C) and 6000 cycles down to 80% DoD (@35A, 25°C), while the Trojan T-105 can withstand 1200 cycles down to 50% DoD and the “premium line” Trojan T-105 RE can withstand 1600 cycles down to 50% DoD and 1000 cycles down to 80% Do

Charging: Any good lead-acid battery charger can be used to recharge the Trojan T-105 battery pack, although an intelligent battery charger with temperature correction and wet/flooded battery charging mode is strongly recommended. A dedicated lithium CC/CV (Constant Current/Constant Voltage) battery charger or a lead-acid battery charger with the dedicated charging mode for lithium batteries is required for the VMAX LFPGC2-12175XTR battery pack.

Whether you’re thinking of upgrading your golf cart from lead-acid to lithium batteries, double-check your battery charger to see if it has to be replaced as well. As can be seen, moving from lead-acid to lithium batteries can result in significant weight savings, increased golf cart range, and a battery pack that can endure significantly more charging and discharging cycles. However, the initial cost is more.


The alternative for the 40r battery is replaced with different kinds of batteries as long as you choose features that are similar to it or close. In maritime, automotive, and light industrial applications where a powerful and stable power source is required, GC2 and GC2H batteries are often utilized as heavy-duty, deep cycle batteries.

The lithium GC2 batteries are gradually replacing lead-acid batteries in light vehicle applications due to technological developments, while lead-acid batteries are still in use due to their lower cost (at least initially) and simplicity.  If lithium batteries are too expensive for heavy-duty applications, try wet lead-acid batteries with hefty and thick plates if maintenance is not an issue.

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