Description
Toyo 6GFM50B / 6GFM55 / 6GMF55-HD Battery Replacement – 12V AGM NB (Nut & Bolt)
Restore reliable backup runtime with a 12V sealed AGM (Absorbent Glass Mat) replacement battery for Toyo 6GFM50B and Toyo 6GFM55, 6GFM55-HDapplications. This style is maintenance-free, non-spillable, and built for dependable standby power in demanding environments like emergency lighting inverter systems, UPS, telecom, and general backup power.
Key Features
- 12V sealed AGM (VRLA) technology – spill-proof & maintenance-free
- NB (Nut & Bolt) terminals for secure ring-lug connections
- Designed for standby/backup and light cyclic use
- Strong performance in common backup-power environments (lighting, UPS, telecom)
Size & Terminal Fit (Verify Before Ordering)
- Toyo 6GFM50B (example listing): approximately 10.3 × 6.7 × 8.8 in, NB terminals, 12V
- Toyo 6GFM55 often appears in a Group 22NF-style footprint (varies by sub-model and terminal option)
Important: “6GFM50B” and “6GFM55” can exist in different case sizes depending on the exact variant and vendor listing. Always match: Voltage (12V), capacity class (50–55Ah), terminal type (NB), and physical dimensions.
Replaces / Compatible Models (When Specs Match)
- Toyo: 6GFM50B, 6GFM55, 6GFM55-HD
- Common equivalents (match size + terminals): UB12500 (12V 50Ah class), UB12550 / ML55-12 (12V 55Ah class)
- Other 12V ~55Ah cross-refs seen in distribution: WKDC12-55P, CP12-55, EVA12-55C/FR, HZB12-55, TY12-55, WRA12-55C/FR
Used In / Applications
- Emergency lighting inverter / backup systems that provide lighting power during outages
- Emergency lighting units and building egress backup power systems
- UPS (uninterruptible power supplies) and standby battery cabinets
- Telecom and general standby power
- Emergency lighting inverters (central backup powering overhead fixtures and exit signs)
- Systems that specify batteries in the UB12500 / UB12550 class for inverter cabinets (model-dependent)
If you tell us the inverter/fixture brand + model (or send a photo of the battery label + cabinet), we can confirm the best match.
Information Gain (Buyer Checklist)
- Terminal check: NB (nut & bolt) posts require ring lugs—different from F2/F11 insert or spade tabs.
- Measure the case: length × width × height must match your tray/cabinet clearance.
- Capacity tolerance: 50Ah vs 55Ah can be acceptable only if the charger/inverter specs allow it and the physical size matches.
- System voltage: many emergency lighting inverters use multiple 12V batteries in series—replace as a matched set when required.
FAQ
Q: Is 6GFM50B the same as 6GFM55?
A: Not always. They may be close in capacity, but case size, height, and terminals can differ by variant. Match 12V, NB terminals, and dimensions before ordering.
Q: What does “NB” mean?
A: Nut & bolt terminals—you attach ring terminals/lugs with a nut/bolt for a secure connection (common in inverter/UPS cabinets).
Q: Where are these batteries typically used?
A: In emergency lighting inverter/backup systems, UPS, telecom, and standby power. Emergency lighting inverters are designed to power lighting circuits (including overhead fixtures and exit signs) during outages.
Q: Can I replace only one battery in my inverter cabinet?
A: Sometimes, but many inverter/UPS systems perform best with matched batteries of the same age/type. Check your manufacturer guidance.
Q: How long should an emergency lighting backup battery last?
A: Service life depends on temperature, charging profile, and discharge frequency. If runtime is dropping, testing/inspection is recommended.
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