# AQEX STUBBORN STAMINA LF UPS HAT for the Pi

Stubborn Stamina LF: The Unstoppable LFP UPS for Raspberry Pi

- **Seller:** [AQEX world](https://lectronz.com/stores/aqex), Györ, GYMS, Hungary
- **Price:** €39.90 (EUR, before shipping and taxes)
- **Availability:** In stock
- **Categories:** Power management, Raspberry Pi, Power
- **Product page:** https://lectronz.com/products/aqex-stubborn-stamina-lf-ups-hat-for-the-pi

## Options

**Battery**

- without battery
- With 3.2V 4Ah LiFePo4 battery and holder [Add €13.80]

## Links

- [Documentation](https://github.com/aqexhu/qups-guard)
- [Code](https://github.com/aqexhu/qups-guard/tree/main)
- [Design Files](https://www.aqex.eu/downloads/stubborn-stamina-lf.step.zip)

## Images

![AQEX STUBBORN STAMINA LF UPS HAT for the Pi](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDYxMTEsInB1ciI6ImJsb2JfaWQifX0=--ae09d74d43dd0aeabc1bf7beebf03fa09892ee63/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/2026-04-13T16-3A36-3A31.894Z-stubborn-stamina-lf-raspberry-pi-lfp-ups-hat-assembled_enh2.png)
![AQEX STUBBORN STAMINA LF UPS HAT for the Pi](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDYxMTIsInB1ciI6ImJsb2JfaWQifX0=--b1216f32c6d7d553870e2c9a2027b1c55f115349/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/2026-04-13T16-3A36-3A31.894Z-stubborn-stamina-lf-raspberry-pi-lfp-ups-hat_enh2.png)
![AQEX STUBBORN STAMINA LF UPS HAT for the Pi](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDYxMTMsInB1ciI6ImJsb2JfaWQifX0=--0695ece3efd973f7e7ba5542a3dcb6c2b6aad3c4/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/2026-04-13T16-3A36-3A31.894Z-stubborn-stamina-lf-raspberry-pi-lfp-ups-hat-assembled-2-enh2.png)

## Description

#### What is it?
The uncompromised LiFePO4 power for Raspberry Pi. No jumpers, no settings, no failure. Just relentless uptime.

#### Why did you make it?
The Stamina LF was created for one mission: to provide the most reliable, fail-safe LFP backup for Raspberry Pi without the complexity of industrial setups.

#### What makes it special?
- Pure LFP Safety - We chose LiFePO4 for its 2000+ cycle life and thermal stability—no fire risk, no compromise.
- Plug & Play Simplicity - Standard 5V USB input. No jumpers, no settings, no specialized power supplies..
- Focused Reliability - By stripping away unnecessary features, we reduced heat and failure points, creating a robust, affordable powerhouse.

Check out our webseite for more information: [https://www.aqex.eu/stubborn-stamina-lf-raspberry-pi-lfp-ups-hat.html](https://www.aqex.eu/stubborn-stamina-lf-raspberry-pi-lfp-ups-hat.html)

## Shipping policy

📦 Shipping Policy

Thank you for supporting independent makers! We strive to get your hardware into your hands as quickly and safely as possible.

1. Processing and Handling

    Dispatch Time: Most orders are processed within 2–3 business days, 90% is processed same day.
    Tracking: We recommend selecting Tracked Shipping at checkout for peace of mind. Once your order is shipped, you will receive an automated email with your tracking number and a link to follow its progress.

2. Shipping Rates & Delivery Times

Shipping costs are calculated at checkout based on the total weight of your order and your destination. 

3. EU Taxes, VAT, and Customs (IOSS)

We use Lectronz’s built-in IOSS (Import One-Stop Shop) scheme to make your import process as smooth as possible.
Orders under €150: * VAT is collected at checkout. You will see the VAT rate for your specific country applied to your total.
No "Surprise" Fees: Because we use IOSS, your package should clear customs quickly without additional handling fees or import taxes upon arrival.
Orders over €150: VAT is not collected at checkout. You will be responsible for paying VAT and any applicable customs duties to your local postal service or courier upon delivery.
Intra-EU Shipping: If this store is shipping from within the EU to another EU country, no customs duties apply, and VAT is handled according to standard EU distance selling rules.

4. Shipping Locations

We currently ship to all EU member states. If your country is not listed at checkout, please contact us for a custom shipping quote.

5. Returns & Damaged Goods

14-Day Right of Withdrawal: As per EU law, you have 14 days to return your order for any reason, provided it is in its original condition.
Damaged Items: If your hardware arrives damaged, please take photos of the packaging and the product immediately and contact us through the Lectronz messaging system. We will arrange a replacement or refund.