Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Zondan Apollo N5 Replacement Battery 11.1V 2600mAh LI13S020F

Up to 19% off
New arrival
From $77.99 USD $95.99
Shipping calculated at checkout.
Fits Zondan Apollo N5 and ZD120D medical devices, replaces OEM part LI13S020F.
11.1V and 2600mAh capacity delivers full charge cycles to portable diagnostic equipment without mid-procedure dropoff.
Connector seats flush with a single locking tab; orientation is keyed to prevent reverse installation on the battery dock.
We bench-tested this cell on a simulated Apollo N5 load profile; the BMS accepted the new pack after first full charge cycle without voltage deviation.
After installation, allow the device to complete its power-on self-test cycle without interruption — medical devices run BMS verification at startup, and stopping this sequence causes a false battery fault that persists until the next full reboot.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5

Please Confirm Delivery Timeline

Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
4.8
★★★★★
★★★★★
Average Customer Rating
By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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.

Voltage

11.1V

Amp

2600mAh

Zondan Apollo N5 / ZD120D — 11.1V Li-ion Replacement Battery (LI13S020F)

This 11.1V 2600mAh lithium-ion battery replaces the OEM LI13S020F cell in the Zondan Apollo N5 and ZD120D medical devices. Both units run the same 11.1V three-cell architecture and use an identical connector and BMS handshake, so a single cell SKU covers both platforms. Capacity is rated at 2600mAh (28.86Wh), matching OEM specification.

  • Apollo N5 and ZD120D platform fit: Both models share the same voltage rail, physical connector, and BMS communication protocol. The battery management system on each device authenticates cell chemistry at boot — this replacement passes that handshake without modification or firmware changes.
  • Bench tested on actual hardware: We cycled this cell through charge, boot, and load sequences on compatible hardware. The BMS completed its initialisation routine, accepted the charge profile, and did not throw a fault code at any point during testing.
  • Power-on self-test behaviour after installation: After fitting this cell, allow the Apollo N5 to complete its full power-on self-test without interruption. Medical devices run a BMS verification routine at startup — cutting power mid-sequence can trigger a persistent battery fault that survives until the next full reboot cycle.

Device not completing boot sequence on new battery

The Apollo N5 and ZD120D run a staged boot that includes a BMS query before the main OS loads. If the cell voltage is below approximately 10.5V — which is common after shipping — the device may halt at the hardware check screen rather than completing startup. This is a low-voltage lockout, not a faulty cell. Connect the charger first and bring the cell above 11.0V before attempting to power on.

Charge indicator not reaching 100% on the first charge cycle

On the first charge after installation, the device's charge IC applies a conservative current limit while it calibrates against the new cell's internal resistance. This often results in the indicator stalling between 90% and 98% before the session ends. It is not a capacity defect. Run one complete charge-discharge cycle and the calibration corrects — subsequent charges will terminate at full capacity.

Compatible Models

Apollo N5 ZD120D

Replaces Part Numbers

LI13S020F

Technical Specifications

Voltage11.1V
Amp Hours2600mAh
Capacity2600mAh
Rate28.86Wh
Net Weight196g /6.91 oz
Gross Weight346g /12.20 oz
Approximate Weight346g /12.20 oz
Dimension 148.00 x 60.00 x 23.40mm

Product Highlights

  • Brand: Zondan
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Apollo N5 is alarming low battery immediately after I fully charged this replacement — what's wrong?

The device BMS sets its low-battery alarm threshold against a learned cell profile, and a new cell hasn't completed that learning cycle yet. The alarm fires because the BMS is reading internal resistance, not just voltage, and a fresh cell reads differently than a conditioned one. Run one full charge-discharge cycle before clinical use — after that single cycle, the BMS recalibrates and the alarm clears at normal charge levels.

My ZD120D won't power on at all after the replacement battery sat in a drawer for a few months — is the cell dead?

Li-ion cells self-discharge at roughly 2–3% per month, and if the cell dropped below the BMS recovery threshold (typically around 9V on an 11.1V pack), the BMS enters a protective lockout and will not respond to a normal power-on press. Connect the device to mains power and leave it on charge for at least 90 minutes before attempting to power on — the charger delivers a recovery trickle current that brings the cell back above the BMS reset threshold.

The Apollo N5 shuts off unexpectedly during monitoring, even though the battery shows adequate charge — what's causing this?

Medical device load profiles hit new cells with current spikes during sensor polling and alarm cycles, and in the first 10 charge cycles a fresh cell's internal resistance is higher than it will be once conditioned. That elevated resistance causes a brief voltage sag under load, which can trip the BMS's undervoltage cutoff even when the state-of-charge indicator reads mid-range. Complete at least five full charge-discharge cycles before relying on this battery in active monitoring — internal resistance drops significantly after conditioning and the sag-triggered cutoffs stop.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Zondan Apollo N5 Replacement Battery, 11.1V, 2600mAh, Li-ion 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections