APC
APC PowerStar Replacement Battery Back-UPS ES 350
Bottom line: The APC PowerStar Replacement Battery Back-UPS ES 350: 12V 3.3Ah SLA, 5.28 x 2.64 x 2.40 in, drops into Back-UPS ES 350; main trade-off: bare cell; you reuse the original RBC cartridge housing.
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Pros & Cons
Pros
- ✓ 12V 3.3Ah SLA, 5.28 x 2.64 x 2.40 in, drops into Back-UPS ES 350
- ✓ Fits both APC RBC35 and RBC47 battery cartridges
- ✓ Backed by a 3-year warranty
- ✓ Cross-replaces PS-1230, NP2.6-12, UB1234 and 12+ SLA models
Cons
- ✗ Bare cell; you reuse the original RBC cartridge housing
- ✗ Listing title misstates spec as 2V/2.3Ah vs actual 12V 3.3Ah
- ✗ No wiring harness, tabs, or install tools included
- ✗ SLA chemistry self-discharges; recharge if stored long-term
Manufacturer description
PowerStar 12V 2.3Ah SLA Battery Voltage: 12 Volts Capacity: 3.3Ah L- 5.28" W- 2.64" H- 2.40" Applications UPS, Emergency lighting, Fire alarm and security systems, Telecommunication systems, Backup power for testing and measuring instruments, Alarm and security system, Electronic apparatus and equipment, Communication power supply, DC power supply, Auto control systems Replaces: PS-1230, BP3-12, BP3.6-12, CF12V2.6, CFM12V3, CP1232, NP2.6-12, NP3-12, NPH3.2-12, PE12V3AF1, UB1234, WP3-12, SLA1042, SLA1035, SLA1041 Fits UPS Batteries and More: RBC Battery Cartridges RBC35 APC BACK-UPS ES…
SpecPicks Verdict
SpecPicks scored APC PowerStar Replacement Battery Back-UPS ES 350 using a rating × review-volume × price-fit model applied to published specs and reviews across the power protection category. APC's power protection lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for power protection of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Uninterruptible Power Systems: Provides reliable backup power for UPS applications ensuring continuous operation during power outages
- Emergency Lighting Battery: Suitable for emergency lighting systems, fire alarm and security systems, and backup power applications
- Electric Gates Application: Compatible with electric gate systems requiring 12V battery backup power supply
- Medical Mobility Equipment: Designed for use in medical mobility devices and equipment requiring reliable battery power
- Premium Specifications: 12 Volts 3.3Ah SLA battery with dimensions L-5.28 inches W-2.64 inches H-2.40 inches
- Wide Compatibility: Replaces multiple battery models including PS-1230, BP3-12, CF12V2.6, NP2.6-12, UB1234, and fits APC RBC35 and RBC47 cartridges
Full Specifications
| Brand | APC |
|---|---|
| Voltage | 12 Volts |
| Amperage | 3.3 |
| Unit Count | 1 Count |
| Reusability | Rechargeable |
| Model Number | APC Replacement Battery 35 RBC35 |
| Item Dimensions | 5 x 3 x 2 inches |
| Antenna Location | Emergency Lighting,Ups |
| Battery Capacity | 3.3 Amp Hours |
| Battery Cell Type | Sealed Lead Acid |
| Wide Compatibility | Replaces multiple battery models including PS-1230, BP3-12, CF12V2.6, NP2.6-12, UB1234, and fits APC RBC35 and RBC47 cartridges |
| Number of Batteries | 1 12V batteries required. (included) |
| Premium Specifications | 12 Volts 3.3Ah SLA battery with dimensions L-5.28 inches W-2.64 inches H-2.40 inches |
| Compatible Phone Models | not aplicable |
| Battery Cell Composition | Sealed Lead Acid |
| Electric Gates Application | Compatible with electric gate systems requiring 12V battery backup power supply |
| Emergency Lighting Battery | Suitable for emergency lighting systems, fire alarm and security systems, and backup power applications |
| Medical Mobility Equipment | Designed for use in medical mobility devices and equipment requiring reliable battery power |
| Recommended Uses For Product | Emergency Lighting,Ups |
| Uninterruptible Power Systems | Provides reliable backup power for UPS applications ensuring continuous operation during power outages |
| Full listing title | APC PowerStar Replacement Battery Back-UPS ES 350, 12V 3.3Ah SLA | 2V 3.3Ah SLA battery replacement for APC Back-UPS ES 350, RBC35 & RBC47 with 3-year warranty |
Ready to buy?
APC PowerStar Replacement Battery Back-UPS ES 350, 12V 3.3Ah SLA | 2V 3.3Ah SLA battery replacement for APC Back-UPS ES 350, RBC35 & RBC47 with 3-year warranty is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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