# Cartridge WECARE ARMOR compatible with HP DJ 3940 black

**URL:** https://aio.lv/en/product--armor-k20232w4--3669954
**Data updated:** 2025-12-29 13:42 (EET)
**Category:** Inkjet Printer Cartridges
**Manufacturer:** ARMOR
**Manufacturer code:** K20232W4
**EAN:** 8715057012167
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--armor-k20232w4--3669954

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

The WECARE ARMOR ink cartridge is compatible with HP DJ 3940, featuring a 21ml capacity in black. It delivers high-quality prints with sharp text and vibrant images, ensuring reliable performance for your printing needs. Ideal for home or office use, this cartridge is designed to meet your printing demands efficiently.

## Long description

The WECARE ARMOR cartridge compatible with HP DJ 3940 is a black ink replacement designed for use in HP All-in-One models including Deskjet Portable, 310, 320, 340 and DeskWriter 310, 320. It contains approximately 21 ml of pigment-based ink formulated to deliver sharp, laser-quality text and precise images while reducing maintenance needs and support calls. The cartridge is suitable for general home and office printing and for document storage due to its fade-resistant properties.
Advantages
The cartridge uses pigment-based ink to produce high-resolution, fade-resistant text and images. It is designed for easy installation and refill tool compatibility, helps lower maintenance costs, and aims to maintain consistent print quality and productivity comparable to genuine replacements.
Suitable for
Home printing of documents and labels
Office documents requiring sharp black text
Archival or long-term document storage
All-in-One HP Deskjet and DeskWriter models listed (Portable, 310, 320, 340)
Key specifications
Compatibility: HP Deskjet Portable, 310, 320, 340; HP DeskWriter 310, 320
Colour: Black
Volume: approx. 21 ml
Ink type: Pigment-based, fade resistant
Manufacturer brand: ARMOR (WECARE compatible)
MPN: K20232W4
EAN: 8715057012167
How to use
Turn the printer off, open the cartridge access panel, remove the empty cartridge according to the printer manufacturer's instructions and insert the WECARE ARMOR replacement until it clicks into place. Close the access panel, power the printer on, and run a test print or alignment if prompted. Use the printer's maintenance or cleaning cycle if necessary to ensure optimal print quality.
Usage recommendations
Store cartridges upright in a cool, dry place and install promptly after opening. For best results, use original printer cleaning cycles and avoid mixing different brands in the same printer.

## Specifications

### Features

| Feature | Value |
|---|---|
| Colour | No |
| Print technology | Inkjet printing |
| Compatibility | Deskjet 3910 / 3915 / 3918 / 3920 / 3930 / 3938 / 3940 / 3950 / D1300 / D1311 / D1320 / D1330 / D1338 / D1341 / D1360 / D1368 / D1400 / D1420 / D1430 / D1445 / D1450 / D1455 / D1460 / D1468 / D1520 / D1530 / D1560 / D1568 / D2320 / D2330 / D2338 / D2345 / D2360 / D2400 / D2430 / D2445 / D2451 / D2460 / D2468 / F2110 / F2120 / F2128 / F2140 / F2149 / F2180 / F2185 / F2187 / F2188 / F2210 / F2212 / F2214 / F2224 / F2235 / F2238 / F2240 / F2250 / F2275 / F2276 / F2278 / F2280 / F2288 / F2290 / F2291 / F310 / F325 / F335 / F340 / F350 / F370 / F375 / F378 / F380 / F385 / F388 / F390 / F394 / F4100 / F4135 / F4140 / F4150 / F4172 / F4175 / F4180 / F4185 / F4188 / F4190 / F4194
Fax 1250serie
Officejet 1410 / 4300 / 4311 / 4312 / 4314 / 4315 / 4317 / 4319 / 4352 / 4353 / 4355 / 4357 / 4359 / 4625 / 4638 / 4712 / 4713 / J3608 / J3625 / J3635 / J3640 / J3680 / J5508 / J5520
PSC 1401 / 1402 / 1403 / 1406 / 1408 / 1415 / 1417 |
| Printing colours | Black |
| Quantity per pack | 1 pc(s) |
| Ink type | Pigment-based ink |
| Black ink type | Pigment-based ink |

### Other features

| Feature | Value |
|---|---|
| Capacity cartridge | 550 sheets |
| Print cartridge volume (metric) | 17 ml |

## FAQ

### How much does the Cartridge WECARE ARMOR HP DJ 3940 black cost, and is it available for purchase?

The price is 17.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All ARMOR products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ARMOR service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: printing colours, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/3669954/62630112_large.webp