Warranty and repairs

Built to be fixed, not thrown away.

Every W0AEZ battery comes with a 1-year warranty. And because the packs are user-serviceable, a worn part or tired cells are a quick fix, not a new battery.

Start a warranty claimShop replacement parts

Every pack1 year warrantyHand-built in Colorado

What the warranty covers

Covered

  • Cells or BMS that fail under normal use
  • USB-C charging port or charge board failure
  • Shell cracking, latch breakage, or structural failure under normal use
  • Assembly or workmanship defects

Not covered

  • Normal cell capacity loss over time
  • Drops, crushing, or other physical damage
  • Water, moisture, or smoke exposure
  • Cells other than quality, authentic cells (we recommend Samsung 50E for 21700 and 35E for 18650), or other modifications

The warranty runs 1 full year from delivery, for the original buyer. Packs bought used aren't covered, but contact us either way. Lithium cells naturally lose some capacity over time. That's expected wear, and it's exactly why the cells can be replaced.

Three ways back on the air

Pick what suits you. Under warranty, the fix is on us.

  • Fix it yourself

    Replacement parts

    Shells, inserts, latches, and spacers for every pack, with step-by-step videos. Most fixes take a few minutes.

    Shop parts

  • We ship the part

    Parts sent to you

    Under warranty, we'll send the part you need. You keep your radio on the air and skip the mail-in.

    Start a claim

  • Mail-in

    Shop repair

    Send the pack to the shop and we fix it on the bench. Best for cell or BMS issues.

    How mail-in works

Shipping on warranty claims

Who pays for what

United States

Domestic
  • W0AEZ pays to ship it back to you, whether it's replacement parts, a repaired pack, or a replacement pack.
  • For a mail-in repair, you pay to ship the pack to the shop. Discharge it below 30% first, and we'll email the packing steps.

Everywhere else

International
  • No need to send the old one back. Shipping a battery overseas costs more than it's worth, so we just send the fix.
  • You cover shipping on the replacement parts or pack. Import duties and taxes are also yours.

Mail-in service

Send it in for a refresh

Out of warranty, or just an older pack? Mail it to the shop. We'll put in fresh cells, fit the latest shell revision, and test it before it ships back. Out-of-warranty repairs and refreshes: you pay shipping both ways.

  • Warranty repairWithin 1 yearFree
  • Fresh cellsNew cells, testedQuoted at repair
  • Shell upgradeLatest revisionShell price + $10 labor
  • Add etchingWhile it is here$15

How a mail-in works

  1. Submit a claimPick "Mail-in repair" on the form below.
  2. Get your packing stepsDischarge the pack below 30%. We email how to pack and label it (USPS hazmat, or UPS Ground).
  3. We fix and test itStarted within 72 hours of arriving: bench repair, a capacity test, and a fresh look over.
  4. Back to youOur goal is 7 days from arriving at the shop to shipping back, with tracking. Return shipping is free in the US for warranty repairs.

Start a claim

Tell us what's going on. A photo or short video helps a lot. Most issues get fixed with a part, and we'll reply with the fastest option.

  • Reply within 72 hours
  • Guides and videos for most fixes are on the Documents page
  • Try a different USB-C cable first if it won't charge
What's happening?

Paste a link to photos or a short video (Google Photos, YouTube, Dropbox), or reply to our email with attachments.

How would you like it fixed?

US: you ship the pack in, we pay return shipping. International: no need to send it back.

Questions

How long is the warranty?

One full year from delivery, for the original buyer. It covers the cells, BMS, charging board, shell, and workmanship under normal use.

Do I need my order number?

Yes. We need your order number to start a claim. It's in your order confirmation email, and in your account under Orders.

Is my pack still covered if I replaced the cells myself?

Yes, as long as you used quality cells. We only recommend authentic Samsung 50E cells for 21700 packs and Samsung 35E cells for 18650 packs.

How do I ship a lithium battery safely?

Discharge the pack as far as you can, to below 30%. Then:

  • USPS: tell the clerk it's a lithium battery and ship it as hazmat.
  • UPS: no special disclosure needed, but it can only go by Ground.

Submit a claim first, and we'll email the rest of the packing steps.

How long does a mail-in repair take?

Shipping time both ways is up to the carriers. Once your pack reaches the shop, we start the repair within 72 hours. Our goal is 7 days from arriving at the shop to shipping back to you. If we need to follow up with you, that adds time.

Can I send in a pack I bought used?

Packs bought used don't qualify for the warranty, but please contact us either way and we'll work out a resolution.

Full warranty terms

W0AEZ Radio Gear LLC Limited Warranty

Effective November 2026. This limited warranty is given by W0AEZ Radio Gear LLC ("W0AEZ", "we", "us"), Greeley, Colorado, United States. Email: kevin@w0aez.com.

1. Who is covered

This warranty covers the original purchaser of a new W0AEZ battery pack bought from w0aez.com or directly from W0AEZ. It is not transferable. Packs bought used or second-hand are not covered by this warranty, but please contact us either way and we'll work toward a resolution.

For DIY kits, this warranty covers the parts we supply. It does not cover the assembly you do.

2. How long it lasts

One (1) full year from the date your order is delivered, as shown by the carrier's tracking.

3. What is covered

Defects in materials and workmanship under normal use, including:

  • Cells or the battery management system (BMS) failing under normal use
  • USB-C charging port or charge board failure
  • Shell cracking, latch breakage, or structural failure under normal use
  • Assembly or workmanship defects

Replacing the cells yourself does not void this warranty as long as you use quality, authentic cells. We only recommend authentic Samsung 50E cells for 21700 packs and Samsung 35E cells for 18650 packs.

4. What is not covered

  • Normal loss of cell capacity over time
  • Drops, crushing, or other physical damage
  • Water, moisture, or smoke exposure
  • Cells other than quality, authentic cells, or other modifications
  • Use with incompatible or non-approved equipment, or use that doesn't follow our instructions
  • Minor cosmetic variation in 3D-printed parts (layer lines, texture, slight color differences) that doesn't affect function
  • Loss or theft

5. What we will do

If your pack has a covered defect, we will, at our option, send you replacement parts, repair the pack, replace the pack, or refund the purchase price. A repaired or replacement pack is covered for the rest of the original warranty period.

6. How to make a claim

  1. Submit a claim within the warranty period using the claim form on our Warranty page, or email kevin@w0aez.com. Your order number is required. Photos or a short video of the problem help a lot.
  2. We'll reply with the fastest fix. Often that is a part you can swap yourself.
  3. Please don't send a pack in until we've approved a mail-in repair. We'll email the shop's shipping address and packing steps with the approval.

7. Shipping

United States: for a mail-in repair, you pay to ship the pack to our shop. You're responsible for the pack until it reaches us, so package it securely. We pay to ship the replacement parts, repaired pack, or replacement pack back to you.

Outside the United States: you don't need to send the old pack back. We send the fix, and you pay for shipping it plus any import duties and taxes.

Out-of-warranty repairs and refreshes: you pay for shipping both ways.

Shipping a lithium battery: discharge the pack as far as you can, to below 30%. With USPS, tell the clerk it is a lithium battery and ship it as hazmat. UPS needs no special disclosure, but it can only go by UPS Ground.

8. Repair time

We start repairs within 72 hours of a pack arriving at the shop. Our goal is to ship it back within 7 days of arrival. If we need to follow up with you, that adds time. Carrier transit times both ways are outside our control.

9. Damaged or wrong on arrival

If your order arrives damaged, defective, or incorrect, report it within 7 days of delivery as described in our Refund policy.

10. Limits

Any implied warranties, including the implied warranties of merchantability and fitness for a particular purpose, are limited to the one-year length of this warranty. W0AEZ is not responsible for incidental or consequential damages, including damage to radios or other equipment used with the pack. Some states do not allow limits on how long an implied warranty lasts, or the exclusion or limitation of incidental or consequential damages, so these limits may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.

This warranty is governed by the laws of the State of Colorado, USA.