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FM Small UPS Batteries
This series incorporates AGM technology, which suspends the liquid electrolyte within highly porous glass-fiber mat separators. These act as a sponge-like material, absorbing the loose electrolyte and eliminating accidental leaks or spills. The VRLA recombinant design eliminates the need for regular maintenance and enables fitment in hard-to-reach locations without loss of performance, capacity, electrolyte, or cycle life.
Available in 4V, 6V, and 12V models up to 28Ah, the FM series is supplied wholesale directly from our factory.
SPECIFICATIONS
12V Series12V FM series specification table6V Series6V FM series specification table4V Series4V FM series specification table
12V SeriesTech DrawingFAQs
| Serial No. | Battery Model No. | Voltage | Capacity | Dimension (mm±2) | Weight | Terminal | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| (V) | Ah/20hr | L | W | H | TH | Kg±3% | Type | Position | ||
| 1 | 6-FM-1.3 | 12 | 1.3 | 97 | 43 | 52 | 58 | 0.58 | F3 | E |
| 2 | 6-FM-3.3 | 12 | 3.3 | 134 | 67 | 60 | 67 | 1.3 | F3 | E |
| 3 | 6-FM-4 | 12 | 4 | 90 | 70 | 101 | 107 | 1.43 | F1 | C |
| 4 | 6-FM-4.5 | 12 | 4.5 | 90 | 70 | 101 | 107 | 1.68 | F1 | C |
| 5 | 6-FM-5 | 12 | 5 | 90 | 70 | 101 | 107 | 1.8 | F1 | C |
| 6 | 6-FM-7 | 12 | 7 | 151 | 65 | 95 | 101 | 2.25 | F1,F2 | F |
| 7 | 6-FM-7.5 | 12 | 7.5 | 151 | 65 | 95 | 101 | 2.55 | F1,F2 | F |
| 8 | 6-FM-8 | 12 | 8 | 151 | 65 | 95 | 101 | 2.56 | F1,F2 | F |
| 9 | 6-FM-9 | 12 | 9 | 151 | 65 | 95 | 101 | 3.3 | F1,F2 | F |
| 10 | 6-FM-10 | 12 | 10 | 151 | 98 | 95 | 101 | 3.48 | F2 | F |
| 11 | 6-FM-12 | 12 | 12 | 151 | 98 | 95 | 101 | 4 | F2 | F |
| 12 | 6-FM-14 | 12 | 14 | 151 | 98 | 95 | 101 | 4.3 | F2 | F |
| 13 | 6-FM-17 | 12 | 17 | 181 | 76 | 167 | 167 | 5.4 | T5 | D |
| 14 | 6-FM-18 | 12 | 18 | 181 | 76 | 167 | 167 | 5.6 | T5 | D |
| 15 | 6-FM-20 | 12 | 20 | 181 | 76 | 167 | 167 | 6.3 | T5 | D |
| 16 | 6-FM-22 | 12 | 22 | 181 | 76 | 167 | 167 | 6.7 | T5 | D |
| 17 | 6-FM-24 | 12 | 24 | 175 | 166 | 125 | 125 | 8.4 | F5/F8 | D |
| 18 | 6-FM-26 | 12 | 26 | 175 | 166 | 125 | 125 | 9.4 | F5/F8 | D |
| 19 | 6-FM-28 | 12 | 28 | 165 | 126 | 175 | 182 | 10.3 | F5/F8 | D |
Note:
1. In the Dimension columns: L = Length, W = Width, H = Height, TH = Total Height.
2. Due to the wide range of battery models, if the battery model you are interested in is not shown in the specification chart, please contact us.
3. The specifications are subject to update without notification for reasons of improvement.
Terminal Type Drawing: F1-F20
Terminal Position (Polarity): A-L
Frequently Asked Questions
What does the rated capacity Ah/20hr mean?
It is the capacity measured when a fully charged battery discharges at the 20-hour rate down to the designed cut-off voltage. For example, a 7 Ah battery can supply 0.35 A for 20 hours.
Are FM batteries maintenance-free?
Yes. FM batteries use VRLA AGM construction with internal oxygen recombination, so no electrolyte top-up is required during the whole service life.
What does a model name such as 6-FM-7 indicate?
The first figure is the number of cells (6 cells means 12 V nominal), FM is the series code, and the last figure is the rated capacity in ampere-hours at the 20-hour rate.
Can FM batteries be mounted in any position?
Yes. Because the electrolyte is immobilized in the AGM glass mat, FM batteries operate in almost any orientation. Upside-down mounting is not recommended.
How should FM batteries be stored before installation?
Keep them in a cool and dry place and recharge them periodically. The lower the storage temperature, the slower the self-discharge rate.
6V SeriesTech DrawingFAQs
| Serial No. | Battery Model No. | Voltage | Capacity | Dimension (mm±2) | Weight | Terminal | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| (V) | Ah/20hr | L | W | H | TH | Kg±3% | Type | Position | ||
| 1 | 3-FM-1.3 | 6 | 1.3 | 97 | 24 | 52 | 58 | 0.3 | F3 | C |
| 2 | 3-FM-3.2 | 6 | 3.2 | 134 | 34 | 62 | 68 | 0.7 | F3 | C |
| 3 | 3-FM-4 | 6 | 4 | 70 | 47 | 101 | 107 | 0.72 | F1 | A |
| 4 | 3-FM-4.5 | 6 | 4.5 | 70 | 47 | 101 | 107 | 0.84 | F1 | A |
| 5 | 3-FM-7 | 6 | 7 | 150 | 34 | 94 | 100 | 1.15 | F1 | C |
| 6 | 3-FM-7.5 | 6 | 7.5 | 150 | 34 | 94 | 100 | 1.3 | F1 | C |
| 7 | 3-FM-10 | 6 | 10 | 151 | 50 | 94 | 100 | 1.82 | F2 | C |
| 8 | 3-FM-12 | 6 | 12 | 151 | 50 | 94 | 100 | 1.95 | F2 | C |
Note:
1. In the Dimension columns: L = Length, W = Width, H = Height, TH = Total Height.
2. Due to the wide range of battery models, if the battery model you are interested in is not shown in the specification chart, please contact us.
3. The specifications are subject to update without notification for reasons of improvement.
Terminal Type Drawing: F1-F20
Terminal Position (Polarity): A-L
Frequently Asked Questions
What applications are 6V FM batteries designed for?
They serve emergency lighting, security and alarm systems, small UPS units, portable instruments and other compact backup devices.
What does a model name such as 3-FM-4.5 mean?
The first figure is the number of cells (3 cells means 6 V nominal), FM is the series code, and the last figure is the rated capacity at the 20-hour rate.
Can 6V FM batteries be connected in series for higher voltage?
Yes. Series connection adds the voltages while the capacity stays unchanged. Use batteries of the same model and similar age for the best results.
Do 6V and 12V FM batteries share the same charging settings?
No. A 6V battery needs roughly half the charging voltage of a 12V battery. Always set the charger according to the datasheet of the specific model.
4V SeriesTech DrawingFAQs
| Serial No. | Battery Model No. | Voltage | Capacity | Dimension (mm±2) | Weight | Terminal | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| (V) | Ah/20hr | L | W | H | TH | Kg±3% | Type | Position | ||
| 1 | 2-FM-3.2 | 4 | 3.2 | 90 | 34 | 60 | 66 | 0.45 | F1 | C |
| 2 | 2-FM-3.5 | 4 | 3.5 | 48 | 48 | 102 | 108 | 0.45 | F2 | D |
| 3 | 2-FM-4.5 | 4 | 4.5 | 48 | 48 | 102 | 108 | 0.5 | F1 | D |
| 4 | 2-FM-10 | 4 | 10 | 102 | 44 | 95 | 101 | 1.0 | F1 | C |
Note:
1. In the Dimension columns: L = Length, W = Width, H = Height, TH = Total Height.
2. Due to the wide range of battery models, if the battery model you are interested in is not shown in the specification chart, please contact us.
3. The specifications are subject to update without notification for reasons of improvement.
Terminal Type Drawing: F1-F20
Terminal Position (Polarity): A-L
Frequently Asked Questions
What are 4V FM batteries used for?
They power emergency lighting, exit signs, small backup equipment and other low-voltage devices that need a compact and reliable power source.
What does a model name such as 2-FM-10 mean?
The first figure is the number of cells (2 cells means 4 V nominal), FM is the series code, and the last figure is the rated capacity at the 20-hour rate.
Do FM batteries require regular maintenance?
No. The sealed VRLA AGM design recombines gases internally, so there is no need to add water during service.
What is the difference between the FM series and deep-cycle ranges?
FM batteries are optimized for standby float service, while our 12V deep-cycle and 2V long-life ranges are designed for repeated cyclic discharge. Choose according to your application.
RELATED BATTERY RANGES
12V Deep-Cycle Battery SeriesDeep-cycle 12V SLA batteries for solar, RV and mobility cyclic duty.2V Long-Life Series2V long-life VRLA batteries for telecom and UPS standby power.12V Front Terminal SeriesFront-terminal 12V batteries designed for narrow telecom cabinets.2V OPzV SeriesTubular gel 2V OPzV batteries for long life and deep cycling.2V OPzS SeriesFlooded tubular 2V OPzS batteries for high-capacity standby systems.
CONTACT US
If you don't find the desired battery size, need customized OEM/ODM power solutions, or have any special requirement, please contact us.