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Rectangular black sealed lead-acid battery cartridge with front handle and terminal block

Battery Technology Inc.

Battery Technology Inc. RBC43-SLA43-BTI ups replacement battery

SKU CH-6N2C-68MJE MPN RBC43-SLA43-BTI

A 12 V lead-acid, maintenance-free, hot-swappable cartridge that replaces APC UPS battery #43 in compatible SUA and SMT models

  • Product typeBattery Unit
  • Compatible withAPC UPS: DLA2200RMI2U DLA3000RM2U DLA3000RMl2U DLA3000RMT2U
  • Product weight44.45 lb (20.2 kg)
  • Direct fit for many APC Smart-UPS models
  • Maintenance-free lead-acid chemistry saves time
  • Hot-swappable design keeps power on during swap
  • 45 lb cartridge delivers reliable backup
  • 12 V DC output matches original specifications

Direct APC UPS Compatibility

This sealed lead-acid cartridge fits a wide range of APC Smart-UPS and Symmetra models including the SUA2200, SUA3000, SMT2200 and SMT3000 series. It is built for IT managers and facility teams who need a drop-in replacement that restores backup runtime without rewiring or firmware changes.

Hot-Swap Maintenance Under Load

The maintenance-free design allows the module to be exchanged while the UPS remains online and powering connected equipment. Lead-acid chemistry delivers steady voltage during extended discharge cycles, so critical loads stay supported through long utility outages rather than brief interruptions.

Replaces Aging APC RBC43 Cartridges

This unit substitutes for the original APC RBC43 battery pack when runtime has degraded or self-test warnings appear. The upgrade is worthwhile when the existing pack no longer holds sufficient charge for the required autonomy window; it is not suited for users needing lithium-ion energy density or longer cycle life than lead-acid provides.

How it compares

Measured against everything we stock in UPS Replacement Batteries, at today’s prices. Recalculated every night.

Price $236.99
Pricier than about 88% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand nameBTI
Model nameSLA43-BTI
Product typeBattery Unit
Size & build
Product weight44.45 lb (20.2 kg)
Shipping weight20.87 kg
Package size622 × 305 × 191 mm

Questions about this item

How much heat does the 12 V lead-acid cartridge generate during continuous operation?

The sealed lead-acid design runs maintenance-free and produces minimal heat; normal rack airflow is sufficient for all-day operation.

Which APC UPS models must I already own for cartridge #43 to fit?

It replaces the battery in SUA2200RM2U, SUA2200RMI2U, SUA3000RM2U, SMT2200RM2U, SMT3000RM2U and the other listed 2200/3000 VA units.

Will the hot-swappable cartridge work alongside older SUA-series UPS units still in my rack?

Yes, it is a direct replacement for SUA2200 and SUA3000 models, so existing units keep running while you swap the cartridge.

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