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Enersys  |  SKU: BW-13645

BS BX12-350 High Performance Replacement Battery

Sale price $461.40 USD Regular price $558.71
Shipping calculated at checkout.

➤ High-rate discharge design for excellent UPS performance

➤ Low self-discharge rate of less than 3% per month

➤ Long standby life up to 10 years and 300 full discharge cycles

➤ Spill-proof, no-leak construction operable in any position

➤ ABS flame retardant case with UL listing and 3-year warranty


📦🚀 FAST SHIPPING: Usually ships same day if ordered before 2 PM EST

⚠️ Quick Reminder

🔹 Please ensure the original battery model number is listed in our product description and that your device model number matches for compatibility.
🔹 We only supply the batteries shown in the images. Device images are provided for reference only.

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Battery Care Guide

Battery Usage and Maintenance Guidelines 🔋

Please read the following instructions carefully before using your new battery. Proper adherence will help ensure optimal performance and extended service life.

1. Cordless Phones, PDAs, and Power Tools (NiMH, NiCd, Lithium-Ion) 📱

Initial Charge

  • Fully charge the battery overnight prior to first use.

Conditioning (First 2–6 Charge Cycles)

  • Operate the device until the battery reaches approximately 20% capacity.
  • Avoid premature recharging.
  • Do not allow the battery to fully discharge during the initial cycles.

Post-Conditioning

  • Recharge the battery only when necessary.
  • These batteries are capable of approximately 500 charge cycles:
  • Once daily → ~500 days
    Twice daily → ~250 days
    Note: Even a partial recharge is considered a full cycle.

2. Sealed Lead Acid (SLA) Batteries 💡

  • No conditioning required.
  • Maintain the battery in a fully charged state; avoid complete discharge.
  • Capable of 300–400 charge cycles.
  • Expected service life: 2–3 years, depending on usage conditions.

3. Laptop Batteries (Lithium-Ion) 💻

Initial Charge

  • Fully charge the battery overnight prior to first use.

Conditioning (First 2–6 Charge Cycles)

  • Charge fully, then discharge to approximately 20% capacity.
  • Avoid complete discharge, as some devices may not detect a fully drained battery.

Post-Conditioning

  • Minimize frequent plugging and unplugging.
  • Allow the battery to discharge moderately at least once per month to maintain optimal performance.
  • Occasional cycling is recommended to sustain battery health.

Professional Recommendation

Adhering to these guidelines will enhance battery longevity and ensure reliable performance.

For further assistance regarding your battery or order, our customer support team is available to provide guidance.

Delivery and Shipping

Everything You Need to Know About Shipping with BatteryWeb (USA)

We know reliable delivery matters when you need power fast. Here’s how BatteryWeb makes shipping easy across the USA:

🚚 Shipping & Delivery

Most orders ship next business day (some products like sealed lead acid may take a little longer).

Same-day shipping available if you order before 11:59 AM (delivery depends on the carrier).

We ship nationwide using FedEx, UPS, USPS, DHL, and regional ground carriers.

Shipping costs are calculated automatically at checkout based on weight, distance, and carrier.

Transit times shown are estimates only (business days, no weekends/holidays).

🌍 Shipping Restrictions

Lithium batteries cannot be shipped by USPS or air. They must go via FedEx Ground, UPS Ground, or DHL Ground.

PO Box deliveries are only available via USPS.

At this time, we do not ship lithium batteries to Puerto Rico. NiMH, NiCd, and Alkaline can be shipped.

📦 Important Notes

Double-check your shipping address! If an incorrect address is used and the order is returned, re-shipping costs are the buyer’s responsibility.

If a product is temporarily out of stock, we’ll notify you right away with the expected restock date—or issue a refund if you prefer.

💲 Currency & Pricing

All prices are shown in USD.

Orders shipped outside the USA may be subject to local taxes, customs fees, or import duties. These are the buyer’s responsibility.

⚡ At BatteryWeb, we’re committed to getting your batteries delivered quickly, safely, and affordably—so you’ll always have the power you need, when you need it.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

🔹 Our products are generic replacement parts and are not affiliated with, endorsed by, or manufactured by the original equipment manufacturers (OEMs).


Volts & Amps

12 Volts | 97 Ah

Terminal Type

Internal Thread

BS Battery BX12-350 Replacement Battery — Compatible with BX12-350

This replacement battery is engineered for compatibility with the BS Battery BX12-350 model and built to deliver reliable UPS performance. Featuring a high-rate discharge design, it reliably supplies power during critical outage events and high-load conditions. Ideal for those seeking a dependable, long-lasting battery for standby and cycle applications, the BX12-350 replacement combines safety, durability, and steady performance.

Key Specifications

  • Model: BX12-350 (replacement)
  • Brand: BS Battery (compatible); Enersys (listed)
  • Voltage: 12 Volts
  • Amp-hours: 97 Ah
  • Watts per cell: 370 Watts per cell on 15-min rate at 1.67 Volts
  • Design: High-rate discharge design
  • Technology: Absorbent Glass Mat (AGM) Technology
  • Case: ABS (UL94 V-0) flame retardant case
  • Construction: Spill proof, no-leak construction; operable in any position
  • Self-discharge: Less than 3% per month
  • Expected life: Up to 10 years in standby use
  • Cycle life: Up to 300 cycles at 100% discharge in cycle service
  • Terminal: Internal Thread
  • Warranty: 3 Year Warranty
  • Certifications: UL Listed
  • Condition: Brand New, Factory Fresh

Benefits

The BX12-350 replacement battery delivers a combination of durability and performance that is critical for UPS systems, emergency power, and telecommunications. With AGM technology and a flame-retardant ABS case, this high-performance battery is built to withstand demanding conditions while minimizing maintenance and leakage risk. Its low self-discharge rate ensures the battery remains ready for extended standby service, making it an excellent long-lasting battery option for infrequently used backup systems.

The unit’s spill-proof construction and ability to be mounted in any orientation allow for flexible installation in server rooms, control cabinets, and mobile power enclosures. Rated for up to 300 complete cycles at 100% discharge, it also supports cycle-intensive applications like portable power units and field service equipment. Whether replacing aging cells in a UPS string or upgrading backup capacity, this replacement battery offers consistent, reliable output and proven longevity.

Don’t wait for a power failure — secure the BS Battery BX12-350 replacement battery today for dependable UPS backup and emergency power. Purchase now to take advantage of fast shipping on in-stock items.


Payment & Security

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