Product Specifications for APCRBC159 Replacement Battery Cartridge for APC
| BM Part #: | APCRBC159 |
|---|---|
| Voltage: | 24 Volt |
| Capacity: | 18 Ah |
| Type: | Sealed Lead Acid |
| Length: | 13.13" |
| Width: | 8.5" |
| Height: | 3.09" |
| Shipping Weight: | 26.00Lbs |
| Warranty: | 2 Year |
- This item is not eligible for free shipping.
- Direct replacement for APC RBC159 battery cartridge (also known as APCRBC159).
- Compatible with APC Smart-UPS 1000VA/1500VA rack-mount models (SMT and SMC series).
- 24V 18Ah sealed lead acid (SLA) battery - same specs as original APC battery.
- Rack-mount dimensions: 13.13" x 8.5" x 3.09" (333mm x 216mm x 78mm) - fits standard 19" equipment racks (2U).
- 2-year manufacturer warranty for reliable performance.
- Restores full UPS runtime and battery backup capacity with extended runtime capability.
- Significantly lower cost than buying a new UPS or OEM replacement cartridge.
- Professional-grade battery for servers, workstations, and network equipment.
Product Description
Affordable Alternative to APC Original Batteries
When your APC Smart-UPS starts beeping with a "replace battery" warning or no longer provides adequate backup time during power outages, you don't need to buy an expensive OEM battery cartridge or replace the entire UPS. This APCRBC159-compatible replacement battery from WSP delivers the same 24V 18Ah capacity as the original APC battery at a fraction of the cost. It's a direct fit for APC Smart-UPS 1000VA and 1500VA rack-mount models, restoring full battery backup runtime and protecting your equipment from power outages and surges just like the day you bought your UPS.
Compatible with APC Smart-UPS Rack-Mount Models
This replacement battery works with the following APC Smart-UPS models that originally shipped with the RBC159/APCRBC159 battery cartridge:
Smart-UPS SMT 1000VA Rack-Mount (2U): SMT1000RM2UC, SMT1000RMI2UC
Smart-UPS C 1500VA Rack-Mount (2U): SMC1500-2U, SMC1500-2UC, SMC1500-2UTW, SMC1500I-2U
To verify compatibility, check the label on your UPS (usually on the back, front panel, or inside the rack-mount chassis) for the model number, or open the battery compartment and look for "RBC159" or "APCRBC159" marked on the existing battery. If your model isn't listed but the battery compartment says RBC159 or APCRBC159, this replacement will work.
Same Specifications as Original APC Battery
This sealed lead acid battery matches the electrical and physical specifications of the original APC RBC159/APCRBC159:
- Voltage: 24 Volts (configured as two 12V batteries in series)
- Capacity: 18 Amp-hours (Ah) at 20-hour rate
- Chemistry: Sealed Lead Acid (SLA) / Valve-Regulated Lead Acid (VRLA)
- Dimensions: 13.13" L x 8.5" W x 3.09" H (333mm x 216mm x 78mm)
- Rack Space: Fits 2U rack-mount chassis
- Terminal Type: F2 (Faston .250" tabs)
- Weight: Approximately 26.0 lbs (11.8 kg)
The 24V configuration (two 12V batteries wired in series) provides the higher voltage required by these professional-grade Smart-UPS models. The substantial 18Ah capacity delivers significantly longer runtime compared to standard batteries, making this ideal for servers, workstations, networking equipment, and other business-critical applications that require extended backup power. Because it uses the same sealed lead acid technology as the original, the battery is maintenance-free (no water refilling required) and safe for indoor use in server rooms, data closets, offices, or anywhere your UPS is located.
Installation
Due to the weight (26 lbs) and rack-mount configuration of this battery pack, careful handling is required during installation. The replacement process typically takes 15-30 minutes depending on UPS configuration and rack accessibility. Most Smart-UPS rack-mount models have a front access panel that opens to reveal the battery compartment on slide-out rails. The old battery slides out after disconnecting the wire harness, and the new battery slides in on the same rails before reconnecting.
Safety Note: This battery pack weighs 26 lbs. Use proper lifting techniques or get assistance to avoid injury. For rack-mount units, ensure the UPS is properly supported and the rack is stable before removing or installing batteries.
After installation, plug in your UPS and let it charge for at least 12-16 hours before relying on it for battery backup. Due to the higher capacity (18Ah), initial charging takes longer than standard capacity batteries. The UPS may beep or show a "replace battery" warning initially, but this should clear once the new battery is fully charged and the UPS completes its self-test. Consult your UPS manual if the warning persists after 24 hours of charging.
When to Replace Your UPS Battery
UPS batteries typically last 3-5 years depending on usage, temperature, and how often they're discharged. Signs that your battery needs replacement include:
- UPS beeping continuously or showing a "replace battery" indicator on the front panel or management software
- Significantly reduced runtime during power outages compared to when new
- UPS failing to switch to battery power during outages
- Battery age exceeding 3-5 years, even if no obvious symptoms
- Battery self-test failures reported in UPS logs or management interface
For business-critical applications, replacing the battery proactively every 3-4 years ensures your equipment stays protected. The cost of a replacement battery is minimal compared to the potential cost of downtime, data loss, or damaged equipment from unexpected shutdowns.
2-Year Warranty
This replacement battery includes an 2-year manufacturer warranty covering defects in materials and workmanship. If the battery fails to hold a charge or exhibits manufacturing defects within the warranty period, we'll replace it at no charge. The warranty does not cover damage from misuse, physical damage, or batteries that have simply reached end-of-life due to normal aging.
Frequently Asked Questions
Is this battery as good as the original APC RBC159/APCRBC159?
Yes. This battery uses the same sealed lead acid chemistry, voltage, and capacity as the original APC RBC159/APCRBC159. It's manufactured by WSP to the same specifications and will restore your UPS to full runtime capacity. The main difference is price — third-party replacement batteries cost significantly less than APC's branded cartridges while delivering equivalent performance. We back this with an 2-year warranty.
How do I know if my UPS uses an RBC159/APCRBC159 battery?
Check your UPS model number against the compatibility list above. If your model is listed (typically an SMT1000RM2UC or SMC1500-2U variant), it uses the RBC159/APCRBC159. You can also open your UPS battery compartment and look at the existing battery — if it's marked "RBC159" or "APCRBC159" or measures approximately 13.13" x 8.5" x 3.09", this replacement will fit. When in doubt, take a photo of your current battery (including any labels) and contact us for verification before ordering.
What's the difference between RBC159 and RBC157?
Both batteries have the same physical dimensions and fit the same UPS models, but the RBC159 has significantly higher capacity: 18Ah versus 7Ah for the RBC157. This means the RBC159 provides roughly 2.5 times longer runtime during power outages. The RBC159 is an extended runtime option for users who need longer backup time, while the RBC157 is the standard capacity replacement. If your UPS originally came with an RBC159, use the RBC159 replacement to maintain your extended runtime capability.
Why is this battery 24V instead of 12V?
The APCRBC159 is configured as a 24V battery pack, which is achieved by wiring two 12V batteries in series inside a single rack-mount housing. This higher voltage is required by Smart-UPS 1000VA and 1500VA rack-mount models to deliver the necessary power output for professional servers and workstations. The battery arrives pre-configured as a 24V unit, so you don't need to worry about wiring multiple batteries together — it's a direct replacement.
How much runtime will I get with this battery?
Runtime depends on the load connected to your UPS. A fully charged 18Ah battery in a Smart-UPS 1000VA or 1500VA unit powering a server or workstation (approximately 500-800W load) typically provides 15-30 minutes of backup time — significantly longer than standard capacity batteries. Lighter loads (networking equipment like routers and switches) can run for over an hour. This extended runtime is ideal for applications requiring graceful shutdown procedures or for riding through longer power outages. Check your UPS manual or APC's runtime calculator on their website for charts specific to your model and load scenarios.
Can I install this battery myself, or do I need a technician?
You can install it yourself if you're comfortable working with rack-mount equipment and have basic IT experience. The battery weighs 26 lbs, so use proper lifting technique or get assistance. The installation process is straightforward — most models have slide-out battery trays accessible from the front panel. If you have IT staff who maintain your rack equipment, they can handle the replacement. For critical production systems where you can't risk downtime, consider having a technician perform the work.
Will this void my UPS warranty?
No. In the United States, the Magnuson-Moss Warranty Act prevents manufacturers from voiding warranties simply because you used a third-party replacement part. Using a compatible replacement battery will not void your APC UPS warranty. However, if you have an active warranty or service contract on your UPS and it's experiencing battery issues, contact APC first — they may replace the battery under warranty at no charge.
How long will this replacement battery last?
Under typical conditions (moderate room temperature, occasional discharge cycles), sealed lead acid UPS batteries last 3-5 years. Factors that shorten battery life include high temperatures (above 77°F/25°C), frequent deep discharges, and letting the battery sit uncharged for extended periods. To maximize lifespan, keep your UPS in a cool, well-ventilated area with good airflow and ensure it remains plugged in continuously so the battery stays charged.
Do I need to charge the battery before installing it?
The battery ships with a partial charge but should be fully charged before relying on it for backup power. Install it in your UPS, plug in the UPS, and let it charge for 12-16 hours before using it for battery backup. Due to the high capacity (18Ah), initial charging takes longer than standard capacity batteries. The UPS will charge the battery automatically once connected. Some Smart-UPS models may beep or show warnings until the battery is sufficiently charged and passes the self-test.
Can I recycle my old UPS battery?
Yes, and you should. Lead-acid batteries are highly recyclable and should never go in household trash. Due to the weight (26 lbs), you may want to contact commercial battery recyclers or check with local battery retailers who accept larger SLA batteries. Some municipalities also have hazardous waste collection programs that accept batteries. Many UPS service providers will also accept the old battery for recycling when delivering a replacement.
What if the replacement battery doesn't fit or work?
If you've verified your model number is on the compatibility list and the battery doesn't fit or function properly, contact us immediately. We'll work with you to resolve the issue, whether that means sending a replacement or processing a return. Common issues include incorrect model identification (some APC models look similar but use different battery sizes) or receiving a defective battery, both of which we can address quickly.
Cross Reference & Compatibility
- APC APCRBC159
This battery can be used in these models:
- APC SMC1500-2U
- APC SMC1500-2UC
- APC SMC1500-2UTW
- APC SMC1500I-2U
- APC SMT1000RM2UC
- APC SMT1000RMI2UC
