We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular sealed lead-acid battery with terminal posts

BatteryJack inc.

BatteryJack inc. 6-dzm-20 standard battery

SKU CH-WHM8-DF8K3

Non-spillable AGM battery with 90% gas recombination, maintenance-free for 4-7 years

  • Non-spillable design allows safe operation in any position
  • Advanced AGM technology absorbs electrolyte for steady service
  • Maintenance-free operation needs no water or gravity checks
  • 100 % OEM replacement fits models 51814 6fm17 6-dzm-20 6-fm-18 lcx1220p
  • Gas recombination recovers over 90 % of generated gas

Non-spillable SLA replacement battery

This 12 V sealed lead-acid battery uses AGM technology to deliver 17 Ah or 18 Ah capacity as a direct replacement for part numbers 51814, 6fm17, 6-dzm-20, 6-fm-18 and lcx1220p. It suits UPS units, alarm panels and backup power systems that require a maintenance-free, non-spillable power source.

Simple drop-in installation

The battery arrives fully charged and sealed, so no electrolyte handling or initial watering is needed. Terminal polarity matches the original OEM layout, but verify the connector type before wiring to avoid reversed leads. Mounting in any orientation is supported because the absorbent glass mat prevents leakage.

Steady output under continuous load

Gas recombination exceeds 90 % during normal float service, keeping internal pressure stable during long discharge cycles. The design targets a 4-7 year service life in standby applications without capacity checks or water top-ups. Performance remains consistent as long as the charging voltage stays within the manufacturer's specified float range.

Highlights

  • Non-spillable design allows safe operation in any position
  • Advanced AGM technology absorbs electrolyte for steady service
  • Maintenance-free operation needs no water or gravity checks
  • 100 % OEM replacement fits models 51814 6fm17 6-dzm-20 6-fm-18 lcx1220p
  • Gas recombination recovers over 90 % of generated gas

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the 6-dzm-20 is working as intended after setup?

The battery should hold a stable voltage and deliver the rated 20 Ah capacity without electrolyte leakage thanks to its sealed AGM construction.

What is included with the 6-dzm-20 and what must be purchased separately?

The package contains the non-spillable SLA battery only; cables, connectors or a charger are not included and must be sourced separately.

Which capacity version should I choose among the listed models?

Select the 20 Ah version when replacing a 6-dzm-20 or 6-fm-18; the 17 Ah and 18 Ah models are for different capacity requirements.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.