APC S400RMXLB3U High Performance Replacement Battery
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🔹 Please ensure the original battery model number is listed in our product description and that your device model number matches for compatibility.
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Battery Care Guide
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
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
⚠️ 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 | 7.5 Ah
Terminal Type
F2
SigmasTek 12V 7.5Ah Replacement Battery — APC S400RMXLB3U
Protect your APC S400RMXLB3U with a SigmasTek 12V 7.5Ah replacement battery engineered for reliable compatibility and steady performance. This replacement UPS battery provides the essential 12V output and 7.5Ah reserve capacity to keep critical devices operational during short outages and to allow safe shutdowns. If you rely on the APC S400RMXLB3U, this SigmasTek unit is a high-performance UPS battery that restores backup capability quickly and efficiently.
Key Specifications
- Brand: SigmasTek
- Compatible UPS Model: APC S400RMXLB3U
- Volts: 12V
- Amp Hours: 7.5Ah
- Terminal: F2
- Application Type: UPS
Benefits
The SigmasTek replacement UPS battery is built to provide dependable, long-lasting battery service for compact UPS systems. Its robust construction and predictable discharge profile make it a durable choice for protecting servers, network switches, and storage devices. As a long-lasting battery option, it supports routine charge cycles and maintains performance across the life of the battery pack, reducing the frequency of replacements and minimizing maintenance overhead.
This high-performance UPS battery is well suited for typical applications such as UPS backup for IT infrastructure, emergency power for communications and surveillance systems, and temporary power for tools and troubleshooting during maintenance. The F2 terminal ensures a secure and easy installation, which helps technicians complete battery swaps quickly to restore full backup capability to the APC S400RMXLB3U.
By choosing a SigmasTek replacement, you get a cost-effective way to extend the operational life of your UPS and protect against data loss, equipment damage, and unscheduled downtime. It’s a practical solution for data centers, branch offices, and professional AV deployments where reliable short-term backup is critical.
Ready to ensure uninterrupted backup for your APC S400RMXLB3U? Order this SigmasTek high-performance UPS battery now and secure a dependable, long-lasting battery replacement for your UPS system.
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