As the name suggests, the SMF batteries do not require any maintenance. These batteries do not need you to fill distilled water at regular intervals.
Besides, these batteries are safe because they do not emit any poisonous gases while recharging and discharging.
Though these batteries are ideal for all Indian homes, older adults and busy people prefer to have them because they do not undergo regular maintenance.
These batteries are also known as VRLA (Valve Regulated Lead Acid) batteries. Compared to the tubular batteries, these SMF batteries are less expensive, but they do not last more than three to four years. In comparison, the tubular batteries last for up to five years comfortably.
Are Sealed maintenance-free batteries really maintenance-free?
Pros of SMF batteries
- SMF batteries do not need any maintenance or water topping.
- Compared to the tall tubular batteries, the SMF batteries are less expensive.
- SMF batteries are the safest of all batteries to use because they do not emit any toxic gases.
Cons of SMF Batteries
- SMF batteries are not compatible with all inverters.
The following table sums up the different types of batteries discussed above in brief.
Flat Plate vs Tubular vs Sealed Maintenance Free Battery
| Feature | Flat Plate Battery | Tubular Battery | Sealed Maintenance-Free Battery |
| Battery Lifespan | Low, around three years | Good, about five years | Medium, approximately three to four years |
| Maintenance | High | Medium | No maintenance |
| Water refilling | High | Medium | Not necessary |
| Releases toxic gases | Yes | Yes | No |
| Requires ventilation | Yes | Yes | No |
| Weight | Comparatively low | Heavy | Depends on the model |
| Safety | Low | Low | High |
| Pricing | Least | Most expensive | Medium |
| Top brands | Luminous, Amaron, Exide, Su-Kam | Amaron, Su-Kam, Exide, Luminous | Amaron, Luminous |