Black charger for a heating system with four compartments and two USB cables, against a white background.

New Lenz batteries are here: RCB 1400 & RCB 2000 in focus

The new Lenz batteries are here: RCB 1400 and RCB 2000. Both provide more runtime, fine app control and are compatible with your Lenz heating socks, gloves and textiles. Here you can find out briefly and clearly what's new, how the models differ and which one suits your application. Now new at ski-shop.ch.

What's new about the RCB 1400 & RCB 2000?

More endurance: optimized power management for long days in the snow.
Finer control: manually in 3 stages or via app in up to 9 stages.
Easy handling: compact, robust, quickly clicked onto the textile.

Differences at a glance

Feature	RCB 1400	RCB 2000
Duration of use	for day tours and short cold periods	for very long days and multi-day tours
Weight & size	compact & light	similarly compact, higher capacity
Control	3 stages + app (up to 9)	3 stages + app (up to 9)
For the profile	everyday life, ski day, commuting	tours, deep-freeze days, few charging breaks

Compatibility

Both batteries are compatible with Lenz heated socks, gloves and textiles of the current generation. When pairing in the app, make sure Bluetooth is activated and connect the batteries individually.

Running times & practical tips

Start on a low setting and only increase when needed – this way the battery lasts longer.
Warm feet retain the heat better: tight ski boots reduce the effect.
In severe frost, better to heat constantly at a low setting rather than sporadically at high.

Charging & care

Fully charge for the first charge, then use normally.
When storing: charge about halfway and recharge every 3–6 months.
Store dry and at room temperature; no direct heat sources.

Which battery is right for you?

RCB 1400: You are out and about a lot in everyday life, ski regular days or need warmth for commuting times.
RCB 2000: You plan long tours, ride in very cold weather or want maximum reserve without recharging.

Conclusion

With RCB 1400 and RCB 2000, Lenz addresses two clear needs: light & suitable for everyday use versus maximum endurance. Choose according to application profile – and you'll have warm fingers and feet when it counts.

FAQ

How do I pair the batteries with the app?

Activate Bluetooth, open the Lenz Heat app, select each battery individually and pair. You can then control both sides synchronously or separately.

Can I continue to use old Lenz textiles?

Yes, as long as the interfaces are compatible. Check the connector shape and the product generation of your textiles.

How do I extend the runtime in winter?

Use a low setting, keep the battery warm (e.g. in an inner pocket), do not tighten the textile too much and only increase when really needed.

Are the batteries suitable for flying?

Generally yes, in hand luggage. Find out about your airline’s limits in advance and always carry the batteries safely.

How do I care for the batteries properly?

Protect from moisture, do not overheat, recharge regularly and store half-charged. This way the capacity stays stable.

Related products

Product packaging of Lenz rcb 1400 Lithium Pack, showing two black Body Heat System batteries. The box is black and red.

Lenz Lithium Pack rcB 1400

The Lenz Lithium Pack rcB 1400 (USB-C) BT Smart are compact and lightweight rechargeable batteries for all Lenz Body Heat System products. They provide up to 20 hours of reliable heat and can be flexibly controlled via the battery itself or the free Lenz Heat app. Weighing just 95 g and with a practical charging cradle, they are ideal for sport, work and leisure. Highlights of the Lenz Lithium Pack rcB 1400 Up to 20 hours of heat at the touch of a button Compatible with all Lenz Heat Socks, Heat Gloves, Heat Vests, Heat Jacket and Heat Pants Control: directly on the battery (3 levels) or infinitely variable via the Lenz Heat app (Bluetooth) Lightweight, compact design: only 95 g, dimensions 8.5 × 5.5 × 1.5 cm Quick-charge function and storage mode via USB-C charging cradle Compatible with chargers from rcB 1200, rcB 1800, rcB 2000 and Heat Pack Temperature protection ensures safe charging Package contents 1 pair of Lenz Lithium Packs rcB 1400 (rechargeable) 1 charging cradle for 2 batteries 1 USB-C to USB-A charging cable 2 contact protectors 3 pairs of colored rubber bands Free Heat App (Apple App Store & Google Play) Warnings & safety information FAQ about the Lenz Lithium Pack rcB 1400 Which products are the batteries compatible with? They are compatible with all heatable products in the Lenz Body Heat System - from socks to jackets. How long do the batteries keep you warm? The batteries provide heat for up to 20 hours, depending on the heating level and outside temperature. How can I regulate the heat? Directly on the battery in 3 levels or continuously via the Lenz Heat app via Bluetooth. How does storage mode work? In storage mode, the batteries are automatically charged to approx. 50 % and thus optimally prepared for longer storage times.

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Gray Lenz heating sock with rechargeable batteries, operating instructions and app display.

Lenz Heat Sock 5.1 Toe Cap Set + Battery Packs rcB 1400

The Lenz Sock 5.1 Toe Cap Set with rcB 1400 battery packs combines the proven comfort of the Heat Sock 5.1 with the powerful heating duration of the rcB 1400 Lithium Packs. The Toe Cap® heating elements warm the toes from above and below - sewn in flat and barely noticeable. Thanks to improved elasticity in the calf area, integrated shin protector and ring bandage, the socks fit perfectly, even on strong calves. Advantages of the set Toe Cap® technology - Even warmth in the toe area Increased elasticity - Also ideal for strong calves shin, toe and heel protectors for comfort & protection Merino SOFTTEC® material mix with silk - breathable, soft & quick-drying rcB 1400 batteries - up to 20h heating time, 3 levels or infinitely variable via app USB-C charging cradle - with quick charge function & storage mode Machine washable up to 30°C (remove batteries beforehand) Technical specifications Material socks30 % polyester | 25 % merino wool | 20 % polyamide | 15 % polyacrylic | 5 % silk | 5 % elastane Accu size8.5 × 5.5 × 1.5 cm Battery weightapprox. 95 g per piece Heating timeup to 20 h (depending on heating level & conditions) Control3 levels directly on the battery or infinitely variable via the Lenz Heat app Package contents 1 pair of Lenz Heat Sock 5.1 Toe Cap® 1 pair of rcB 1400 lithium packs 1 USB-C charging cradle for 2 batteries 1 USB-C to USB-A charging cable 2 contact protectors 3 pairs of colored rubber bands 1 wash bag with zipper Free Heat app (Apple & Android) We recommend the Hey Sport Microwash to extend the life of your heated socks. FAQ about the rcB 1400 set How long do the socks give off heat? With the rcB 1400 batteries, the Heat Sock 5.1 provides heat for up to 20 hours. Are the socks washable? Yes, at 30°C in the washing machine. Please remove the batteries beforehand. Which shoes are the 5.1 suitable for? The knee-high socks are ideal for ski and snowboard boots, but also offer comfort in winter and work shoes. Can I also use the batteries for other products? Yes, the rcB 1400 packs are compatible with all Lenz Body Heat System products.

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Lenz Heat Sock 4.1 Set: Black sock with red toe cap, batteries, plug and smartphone with app display.

Lenz Heat Sock 4.1 Toe Cap Set + Battery Packs rcB 1400

The 4.1 Toe Cap® Heat Sock is ideal for normal shoes such as work, hiking or cycling shoes. Without shin protectors, but with maximum comfort - perfect for anyone who wants warm feet without having to rely on a heating sole. The innovative heating elements enclose the toe areas and provide noticeable all-round warmth - even on the upper part of the toe. Lenz Heat Sock 4.1 with rcB 1400 - Highlights Perfect for work shoes, hiking boots and everyday shoes Without protectors - pleasantly thin and flexible Improved fit and high elasticity Barely noticeable Lithium Pack rcB 1400 under the comfort cuff Heat output via 3 levels on the battery or infinitely variable via the Lenz Heat app Quick-drying, odor-binding material - with Polygiene® Machine washable up to 30 °C Material: 50 % polyester | 33 % polyamide | 10 % merino wool | 7 % elastane Battery rcB 1400 - up to 20 hours of warmth Compact, lightweight lithium packs (95 g each) Heat output via 3 levels or infinitely variable via app Up to 20 hours of warmth - ideal for long days outdoors USB-C charging cradle including storage mode and temperature protection Compatible with all Lenz Body Heat System products Package contents 1 pair of Lenz Heat Sock 4.1 Toe Cap 2 Lithium Packs rcB 1400 1 USB charging cradle + cable 1 Washbag with zipper FAQ - Lenz Sock 4.1 Toe Cap Set rcB 1400 How long do the batteries last? The rcB 1400 batteries provide heat for up to 20 hours - depending on the heating level and the weather conditions. Can I wear the socks without the battery? Yes, they work like normal functional socks with high wearing comfort and warming merino wool. How is the heat controlled? Directly on the battery (3 levels) or continuously via the free Lenz Heat app for Android and iOS. Are the socks washable? Yes, machine washable up to 30 °C with the Micro Wash - please remove the batteries beforehand.

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Black and red Lenz Heat Sock, rechargeable battery and app to control the heating socks.

Lenz Heat Sock 6.1 Toe Cap Set + Battery Packs rcB 2000

The Lenz Heat Sock 6.1 Toe Cap Set with rcB 2000 batteries is the premium solution for maximum heating time. The compression socks with a high merino content ensure comfort and increased performance, while the Toe Cap® heating elements heat your toes from above and below. With the powerful rcB 2000 batteries you can enjoy up to 23 hours of warmth - perfect for Lange days of skiing or extreme conditions. Advantages of the set Toe Cap® technology - Warmth around the toe area Thin compression socks - ideal for race boots & tight shoes Merino SOFTTEC® - warms, regulates moisture & does not itch rcB 2000 batteries - up to 23h heating time, 3 levels or infinitely variable via app USB-C charging cradle - Fast & safe charging Machine washable up to 30°C (remove batteries beforehand) Technical specifications Material socks55 % polyamide | 35 % merino wool | 10 % elastane Battery size8.5 × 5.5 × 1.5 cm Battery weightapprox. 115 g per piece Heating timeup to 23 h (depending on heating level & conditions) Control3 levels directly on the battery or infinitely variable via the Lenz Heat app Package contents 1 pair of Lenz Heat Sock 6.1 Toe Cap® Merino Compression 1 pair of rcB 2000 lithium packs 1 USB-C charging cradle for 2 batteries 1 USB-C to USB-A charging cable 2 contact protectors 3 pairs of colored elastic bands 1 wash bag with zipper Free Heat app (Apple & Android) We recommend the Hey Sport Microwash to keep your heated socks hygienic and durable. FAQ about the rcB 2000 set How long does the heat last? With the rcB 2000 batteries you can enjoy up to 23 hours of heat. Can I also use the batteries for other products? Yes, the rcB 2000 packs are compatible with all Lenz Body Heat System products. How do I control the heating levels? Either directly on the battery (3 levels) or continuously via the free Lenz Heat app. Are the socks machine washable? Yes, up to 30°C - please remove the batteries before washing.

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Lenz Lithium Pack rcB 2000

The Lenz Lithium Pack rcB 2000 BT Smart are the most powerful batteries in the Lenz Body Heat System. They provide up to 23 hours of heat for Lenz Heat Socks, Heat Vest, Heat Gloves and Heat Pants. Thanks to USB-C Fast Charge, the packs are ready for use again in around half the usual charging time and are optimally prepared for storage with the storage function. Highlights of the Lenz Lithium Pack rcB 2000 Up to 23 hours of heat output Quick charge function: only 4.5 - 5.5 hours charging time Control directly on the battery or via Lenz Heat App (Bluetooth) Storage mode for a long service life Small, light (115 g) and compact (8.5 × 5.5 × 1.5 cm) USB-C connection and convenient charging cradle Also compatible with rcB 1200, rcB 1800 and Heat Pack chargers Package contents 2 × Lenz Lithium Pack rcB 2000 (rechargeable) 1 × USB-C charging cable 1 × charging cradle FAQ about the Lenz Lithium Pack rcB 2000 Which products are the batteries compatible with? The batteries fit all Lenz Heat Socks, Heat Vest, Heat Gloves and Heat Pants. How is the heat regulated? Either directly on the battery (3 levels) or via the free Lenz Heat app via Bluetooth (9 levels). How does the storage function work? At the touch of a button, the battery automatically charges to approx. 50 % and is thus optimally prepared for storage. How long does it take to fully charge? Normal: 9 - 11 hours, with quick charge function: 4.5 - 5.5 hours.

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