ULS Battery Revival™
ForeFlight Sentry & Sentry Plus Battery Replacement Service
Restore dependable portable runtime without replacing your entire ADS-B receiver.
United Lithium Solutions provides professional internal lithium-ion battery
replacement for compatible ForeFlight Sentry and Sentry Plus devices through
our Las Vegas mail-in service facility.
Sentry & Sentry Plus
Lithium Battery Specialists
Mail-In Service
Charging & Functional Testing
Battery Specialists
Lithium-ion service
Las Vegas, Nevada
U.S.-based service
Tested Before Return
Charging + power verification
Nationwide Mail-In
Tracked shipping recommended
Keep Your Sentry. Replace the Aging Battery.
Lithium-ion batteries gradually lose usable capacity with age and repeated
charge cycles. If your Sentry still performs normally but no longer provides
the runtime it once did, internal battery replacement may extend the useful
life of your receiver without replacing the entire device.
Two models, two battery configurations.
ULS services both the standard ForeFlight Sentry and Sentry Plus. Sentry Plus
units serviced by ULS use a dual-cell cylindrical lithium-ion battery assembly,
so both internal cells are replaced together as a matched set.
Choose Your Sentry Model
Select your receiver model and preferred service speed when ordering.
Pricing reflects the different internal battery assemblies used in these devices.
ForeFlight Sentry
Sentry Battery Replacement
Professional internal battery replacement for compatible standard
ForeFlight Sentry receivers.
- Internal lithium-ion battery replacement
- Professional device disassembly and reassembly
- Battery-area inspection
- Charging response verification
- Power-on and basic functional testing
- Final quality-control inspection
Standard Sentry hardware uses a different battery configuration from
Sentry Plus and is serviced accordingly.
ForeFlight Sentry Plus
Sentry Plus Battery Replacement
Battery service for Sentry Plus receivers using the dual-cell internal
lithium-ion battery assembly serviced by ULS.
- Both internal lithium-ion cells replaced
- Matched replacement cell set installed together
- Original battery carrier retained when serviceable
- Original battery electronics retained when serviceable
- Professional device disassembly and reassembly
- Charging-system verification
- Power-on and basic functional testing
- Final quality-control inspection
Why both cells?
ULS replaces both cells in the Sentry Plus battery assembly together rather
than intentionally pairing one new replacement cell with one aged cell.
Signs Your Sentry Battery May Be Aging
This service is intended for receivers where battery performance has declined
but the device is otherwise generally functional.
Battery drains much faster than it used to
Reduced operating time between charges
Receiver shuts down earlier than expected
Requires frequent USB charging
Only works reliably while connected to power
Battery no longer holds a useful charge
How the Mail-In Service Works
A straightforward process from checkout through completed battery service.
Select Your Service
Choose Sentry or Sentry Plus and select Standard or Priority service.
Ship Your Receiver
Send your receiver to United Lithium Solutions in Las Vegas using tracked shipping.
Battery Replacement
We inspect the battery area, replace the applicable battery cell or cells,
and reassemble the receiver.
Test & Return
Charging and basic device operation are verified before the receiver is returned.
Standard vs. Priority Service
Standard Service
Best for customers without an immediate flight deadline. Standard orders
enter our normal battery-service production queue.
Typical shop turnaround:
Approximately 1–3 business days after the receiver is received by ULS.
Shipping transit time is separate from shop turnaround.
Priority Service
Priority service provides expedited queue placement once the receiver
arrives at United Lithium Solutions.
Typical shop turnaround:
Approximately 24–48 hours after receipt.
Priority service applies to ULS processing time and does not guarantee
carrier transit or delivery times.
What We Verify Before Return
Battery replacement is followed by basic service verification before the
receiver is approved for return shipment.
- Battery installation and connection integrity
- Charging response
- Device power-on operation
- Physical reassembly
- Basic device functionality
- Battery-area inspection
- External condition after reassembly
- Final quality-control review
What Should You Send?
Send Your Receiver
Send the ForeFlight Sentry or Sentry Plus receiver being serviced.
Package the device securely to prevent movement during transit.
Accessories Usually Aren't Needed
Unless specifically requested by ULS, you generally do not need to send
your carrying case, aircraft mount, phone, tablet, or other accessories
for a battery replacement service.
Lithium battery safety:
Do not ship a device that is actively overheating, smoking, leaking, severely
swollen, or otherwise presenting an immediate battery safety hazard.
Battery Service vs. Electronic Repair
This listing is specifically for battery-related service.
Battery replacement does not automatically include repair of unrelated faults
involving the main circuit board, GPS, ADS-B reception, Wi-Fi, display,
charging-port physical damage, corrosion, impact damage, or liquid damage.
If another issue prevents normal battery service or basic testing, ULS may
contact the customer before additional work is performed.
Why Choose United Lithium Solutions?
Lithium Battery Specialists
ULS works with lithium-ion cells, battery assemblies, battery rebuilding,
testing, and custom battery systems rather than operating as a general
consumer-electronics repair shop.
Component-Level Battery Service
We service the battery system inside your existing receiver rather than
requiring replacement of the entire device solely because its battery has aged.
Tested Before Return
Serviced receivers undergo charging and basic functional verification
before they are approved for return shipment.
Frequently Asked Questions
Do you service both ForeFlight Sentry and Sentry Plus?
Yes. United Lithium Solutions services compatible standard ForeFlight Sentry
receivers as well as Sentry Plus units.
Why does Sentry Plus cost more?
Sentry Plus units serviced by ULS use a more involved dual-cell internal
lithium-ion battery assembly. Both cells are replaced together as a matched set,
which requires additional components and service work compared with the standard
Sentry battery configuration.
Can you replace only one cell in a Sentry Plus?
ULS replaces both internal cells together during Sentry Plus battery service.
We do not intentionally pair one new replacement cell with one aged cell in
the dual-cell battery assembly.
What if I choose the wrong Sentry model?
If the receiver received by ULS requires a different battery service from
the option purchased, ULS will contact the customer before performing work
that changes the service price.
Will I receive my original receiver back?
Yes. This is a mail-in battery service performed on your existing receiver.
Does battery replacement repair every Sentry problem?
No. This service is intended to address battery-related performance issues.
Other electronic or physical faults may require separate diagnosis or repair.
How long does the service take?
Standard service typically requires approximately 1–3 business days after
receipt. Priority service typically requires approximately 24–48 hours after
receipt. Shipping transit time is separate.
Who is responsible for shipping?
The customer is responsible for shipping the receiver to and from United
Lithium Solutions unless otherwise stated during checkout or in a written
service agreement. Tracked shipping is recommended.
Your Sentry. Repowered.
Choose your Sentry model and preferred service speed to begin the
ULS Battery Revival™ process. Your existing receiver will be professionally
serviced, tested, and prepared for return after battery replacement.
Independent service disclosure:
United Lithium Solutions is an independent battery service provider and is not
affiliated with, authorized by, sponsored by, or endorsed by ForeFlight or the
original equipment manufacturer. ForeFlight and Sentry trademarks are the property
of their respective owners and are referenced only to identify compatible devices.
Battery replacement service does not constitute certification of ADS-B performance,
aircraft installation, flight readiness, or suitability for any particular aviation
operation. Customers should verify proper device operation before relying on the
receiver during flight.
