100Ah Lithium Battery - 12V, 24V, 36V, and 48V Batteries
High-capacity, ultralight, deep cycle 100Ah lithium batteries are a popular choice for many applications including off-the-grid applications, as trolling motor batteries, electric vehicles, standby and backup systems, security and medical systems, etc.
Although lithium batteries are available in various chemistries, 100Ah lithium batteries are almost exclusively offered as Lithium Iron Phosphate (LiFePO4) batteries, offering good performances without sacrificing safety.
However, if not used and treated properly, even LiFePO4 batteries may become a safety hazard...
Published: October 22, 2021.
100Ah Lithium Batteries Features and Specifications
100Ah lithium batteries are mostly offered in nominal voltages of 12V, 24V, 36V, and 48V, although there are brands that offer high-capacity lithium batteries featuring nominal voltages of 60V, 72V, and even more volts.
The main advantage of electric systems with higher voltages is the fact that those systems require weaker currents to transfer the same power. Also, if the same wires are used, such systems are more energy-efficient.
For example, electric trolling motors up to 55-60 lbs of the thrust are 12V units with maximum currents up to 50-55 Amps, 60-90 lbs thrust electric trolling motors are 24V units with maximum currents of up to 50-55 Amps, 90-120 lbs thrust electric trolling motors are mostly 36V units with maximum currents of up to 50-55 Amps, and 120+ lbs thrust electric motors are mostly 48V units, with maximum currents up to 50-55 Amps.
And the pattern is obvious - in order to increase power, voltage is increased from 12V to up to 48V while maintaining currents up to 50-55 Amps. And such current does require relatively thick cables to keep energy losses low, but these cables are still rather easy to work with.
In order to achieve the required capacity and voltage, some brands use smaller battery 3.2V cells (for example, 36250 or similar) connected in series and parallel, while other brands use individual 3.2V 100Ah cells connected in series.
Regardless of the internal construction and although Lithium Iron Phosphate (LiFePO4) is practically the safest lithium-ion battery chemistry, ALL 100Ah lithium batteries MUST have a built-in Battery Management System (BMS) that monitors battery condition, charging/discharging voltages and currents, and protects the battery from events that may harm the battery, including high/low temperature, high/low voltage, high charging/discharging current, short circuit and similar.
Also, BMS also has another very important task - it has to balance the cells. If there are imbalances among the cells, an individual cell may fail, causing the entire battery to fail or to lower its performance.
Although lithium batteries are initially more expensive than lead-acid batteries, lithium batteries support 5-10x or even more charging/discharging cycles than lead-acid batteries and in the long run, they save both money and weight.
100Ah Lithium Battery Physical Dimensions
Depending on the battery voltage, 100Ah lithium batteries feature physical dimensions of:
- 12V 100Ah: mostly BCI Group 31 batteries (13 x 6.8125 x 9.4375 inches, 330 x 173 x 240 mm), although there are also group 27 and group 30H batteries.
- 24V 100Ah: mostly labeled as BCI Group 4D batteries (20.75 x 8.75 x 9.875 inches, 527 x 222 x 250 mm), but have somewhat larger dimensions and belong to the BCI Group 6D batteries (20.75 x 10 x 10.25 inches, 527 x 254 x 260 mm).
- 36V 100Ah: mostly BCI group 4D/6D batteries, although there are custom-sized batteries as well.
- 48V 100Ah: mostly custom-sized batteries.
Nominal and Actual Voltages
The heart of any 100Ah lithium battery is a 3.2V LiFePO4 cell.
In order to provide larger voltage, several cells are connected in series:
- 12V lithium battery: 4 (four) 3.2V cells in series for actual 12.8V voltage,
- 24V lithium battery: 8 (eight) 3.2V cells in series for actual 25.6V voltage,
- 36V lithium battery: 12 (twelve) 3.2V cells in series for actual 38.4V voltage,
- 48V lithium battery: 16 (sixteen) 3.2V cells in series for actual 51.2V voltage.
Similarly, larger voltages (60V, 72V, etc.) are achievable by connecting even more cells in series.
As the battery is being discharged, voltage drops, especially when the batteries are discharged using stronger currents.
But, this voltage drop is very low when compared with lead-acid batteries.
Most lithium batteries hold their actual voltage between nominal voltage and maximum voltage for almost 90-95% of their discharge curve, leading to excellent energy efficiency.
100Ah Lithium Batteries Comparison Table
The following comparison table lists some of the most popular 12V, 24V, 36V, and 48V 100Ah lithium batteries with their most important features and specifications:
| Model | Voltage Group Size |
Discharge Performances |
Parallel / Series Connections | Weight (lbs/kg) |
| AIMS Power LFP12V100A | 12V 31 |
100A cont. 200A 10s |
? | 30.2 lbs; 13.7 kg |
| AIMS Power LFP12V100B | 12V 31 |
100A cont. 200A 10s |
P: up to 4 S: up to 4 |
28.5 lbs; 12.9 kg |
| Banshee LFP-31M | 12V 31 |
1200 CCA | P: ? S: up to 4 |
24.2 lbs; 11 kg |
| Battle Born BB10012 | 12V 31 |
100A cont. 200A 30s |
P: yes S: up to 4 |
29 lbs; 13.2 kg |
| Battle Born BBGC2 | 12V GC2 |
100A cont. 200A 30s |
P: yes S: up to 4 |
31 lbs; 14 kg |
| Bioenno Power BLF-12100WS | 12V 31 |
100A cont. 200A 5s |
(not recommended) | 28.1 lbs; 12.8 kg |
| BtrPower 12V100Ah | 12V 31 |
100A cont. 200A 5s |
Yes | 24 lbs; 10.9 kg |
| Chins 12V100Ah | 12V 31 |
100A cont. 300A 5s. |
P: up to 4 S: up to 4 |
23.9 lbs; 10.8 kg |
| ExpertPower EP12100 | 12V 31 |
100A cont. 200A 2s |
? | 22.6 lbs; 10.3 kg |
| ExpertPower EP24100 | 24V 4D (6D) |
95A cont. 150A 3s |
? | 47.9 lbs; 21.7 kg |
| FlyPower 12V 100Ah | 12V 31 |
100A cont. 200A 3-5s |
? | 24.3 lbs; 11 kg |
| FlyPower 24V100Ah | 24V 4D (6D) |
100A cont. 200A 3-5s |
Yes | ? |
| FlyPower 36V100Ah | 36V 4D (6D) |
100A cont. 200A 3-5s |
Yes | ? |
| Go Battery 48V 100Ah | 48V - |
120A cont. 300A peak |
P: yes S: ? |
91 lbs; 41.2 kg |
| GreenLiFE GL100-100AH | 12V 31 |
100A cont. 1000A 5s |
Yes | 31 lbs; 14 kg |
| JITA 12V100Ah | 12V 31 |
100A cont. | P: up to 4 S: up to 4 |
24.2 lbs; ~11.0 kg |
| JITA 24V100Ah | 24V 4D (6D) |
100A cont. | P: up to 4 S: up to 2 |
46.3 lbs; 21 kg |
| Kepworth 12V100Ah | 12V 31 |
? | P: ? S: up to 2 |
24.3 lbs; 11 kg |
| Kepworth 24V100Ah | 24V 4D (6D) |
80-100A cont. | (not allowed) | 47.7 lbs; 21.6 kg |
| Kepworth 36V100Ah | 36V 4D (6D) |
80-100A cont. | P: ? S: up to 2 |
56.5 lbs; 25.6 kg |
| Kepworth 48V100Ah | 48V - |
80-100A cont. | (not allowed) | ? |
| Kunmo LF-12100 | 12V 75 |
100A cont. | ? | 25.3 lbs; 11.5 kg |
| LiTime (Ampere Time) 12V 100Ah | 12V 31 |
100A cont. 280A 5s |
P: up to 4 S: up to 4 |
24.25 lbs; 11.0 kg |
| LiTime (Ampere Time) 24V 100Ah | 24V 4D (6D) |
100A cont. 280A 5s |
P: up to 4 S: up to 2 |
47.4 lbs; 21.5 kg |
| LiTime (Ampere Time) 48V 100Ah | 48V - |
100A cont. 280A 5s |
(not allowed) | 99.2 lbs; 44.9 kg |
| Lossigy 12V100Ah | 12V - |
50A cont. | P: up to 10 S: up to 4 |
23.8 lbs; 10.8 kg |
| Lynx 36V 100Ah Battery | 36V - |
100A cont. 200A max. |
Yes | 63 lbs; 28.5 kg |
| Lynx 48V 100Ah Battery | 48V - |
100A cont. | Yes | 89 lbs; 40.3 kg |
| Mighty Max ML100-12Li | 12V 30H (31) |
? | P: up to 4 S: not allowed |
30 lbs; 13.6 kg |
| MoseWorth 36V100Ah | 36V 4D (6D) |
? | (not recommended) | ? |
| PacPow 12V 100Ah | 12V 31 |
100A cont. 300A 10s |
P: up to 4 S: up to 4 |
27.56 lbs; 12.5 kg |
| reBel RB12V-100AH | 12V 31 |
100A cont. | P: yes, no limit S: ? |
22 lbs; 10 kg |
| Renogy RBT100LFP12S-G1 | 12V - |
100A cont. | P: yes S: not allowed |
26 lbs; 11.8 kg |
| Screm Power 12V 100Ah | 12V 31 |
? | P: ? S: no |
24.3 lbs; 11 kg |
| Scream Power 24V 100Ah | 24V 4D (6D) |
100A cont. | ? | 48.4 lbs; 21.9 kg |
| Scream Power 36V 100Ah | 36V 4D (6D) |
100A cont. 200A peak (s?) |
? | 70.5 lbs; 31.94 kg |
| Scream Power 48V 100Ah | 48V - |
100A cont. | ? | 94.7 lbs; 42.9 kg |
| TallentCell LF4160 | 12V - |
80A cont. | ? | 28.2 lbs; 12.8 kg |
| Timeusb 12V 100Ah LiFePO4 | 12V 31 |
100A cont. | P: up to 4 S: up to 4 |
- |
| VMAXTANKS LF27-12100 | 12V 27 |
125A cont. 350A 3s |
P: up to 4 S: up to 4 |
25.3 lbs; 11.5 kg |
| Waterblade LFP 100-12.8 | 12V - |
80A cont. 400A 1s |
? | 29 lbs; 13.2 kg |
| Weize FPLI-12100AH | 12V 31 |
100A cont. 200-250A surge |
P: up to 4 S: up to 4 |
26.4 lbs; 12.0 kg |
| Zooms 12V 100Ah | 12V 31 |
100A cont. | P: up to 4 S: up to 4 |
25.35 lbs; 11.5 kg |
Note: Amazon affiliate links ('Model' column) open in the new windows, feel free to check them for the most up-to-date offers and prices. Also, we have really tried to verify every sling bit of information in this table (and the rest of our site), but things change over time without prior notice ...
Connecting Lithium Batteries in Series and/or Parallel
Lithium batteries should be connected in series and/or parallel only if explicitly allowed by their manufacturer, and even then one should use batteries of similar age, preferably the same battery model from the same batch.
By connecting, for example, 4 (four) 12V 100Ah batteries in series, one can create a 48V 100Ah battery pack.
But, perhaps it is simpler to buy one 48V 100Ah battery and avoid having many contacts to worry about.
Connecting in series and/or parallel lithium batteries from different manufacturers should be avoided, since they all use different BMS systems and can cause charging/discharging issues, but can also lead to destroyed batteries, overheating, fire, etc.
How to Charge 100Ah Lithium Batteries
Lithium batteries should be charged using lithium battery chargers of the required voltage that charge the battery using a charging algorithm suitable for these batteries.
Most lithium battery chargers use Constant Current/Constant Voltage (CC/CV) charging algorithm, ensuring that the battery is fully charged.
Advanced lead-acid battery chargers should NOT be used for charging the lithium batteries since such chargers often have modes that may harm the lithium batteries (desulphation mode, for example). Also, the charging end voltage of such lead-acid chargers is lower than the charging end voltage of lithium battery chargers.
Lead-acid battery chargers should be used to charge the lithium batteries ONLY if they have a dedicated lithium battery charging mode, optimized for such batteries.
The maximum charging current for 100Ah lithium batteries is usually in the 0.5-1.0C range (50-100 Amps), but it is recommended to keep the charging current around 0.2-0.3C (20-30 Amps) in order to prolong the battery's operating lifetime.
Long Story Short: 100Ah lithium batteries are very popular deep-cycle batteries being offered in different voltages including 12V, 24V, 36V, and 48V.
With discharge currents in the 0.5-1.0C range (50-100 Ah), these batteries are able to continuously provide at least 600-1200W @12V, 1200-2400W @24V, 1800-3600W @36V, and 2400-4800W @48V.
Note: this is a calculation for 12V, 24V, 36V, and 48V and NOT for 12.8V, 25.6V, 38.4V, and 51.2V - in real life, these batteries can provide slightly more power.
Because of their features, 100Ah lithium batteries are a common choice for electric trolling motor batteries, electric vehicles, RV house batteries, off-the-grid applications, and similar.
