RDSJ Lenovo ThinkPad X1 Carbon/X1 Yoga Battery 52Wh

RDSJ replacement battery for Lenovo ThinkPad X1 Carbon (4th Gen, 2016) and X1 Yoga (1st & 2nd Gen) — 15.2V, 52Wh Li-ion pack that restores portable runtime.

If your ThinkPad X1 Carbon (2016 / 4th Gen) or X1 Yoga (1st/2nd Gen) no longer holds a useful charge, this RDSJ battery is built to be a direct-fit replacement for a wide range of Lenovo part numbers. It’s a 100% new lithium-ion pack designed to match OEM voltage and capacity while offering up to several hundred recharge cycles when used and charged correctly. The battery ships compatible with models listed and replaces many Lenovo part numbers so installation is straightforward for most users.

Will this battery fit my exact ThinkPad model?

This RDSJ pack is manufactured to be compatible with multiple X1 Carbon and X1 Yoga variants from the 2016 lineup and subsequent 4th Gen models. Check your machine’s model type or the old battery’s part number before purchasing to confirm fitment.

• Compatible with ThinkPad X1 Carbon 2016 and 4th Gen models.
• Fits X1 Yoga 1st Gen (Type 20FQ / 20FR) and 2nd Gen (Type 20JD / 20JE / 20JF / 20JG).
• Cross-replaces Lenovo OEM numbers (01AV409, 01AV410, 00HW028, SB10F46466, SB10K97566, etc.).

How long will the battery last and how many cycles can I expect?

The pack is rated for up to around 500 full recharge cycles, but real-world lifetime depends on usage patterns and charge habits. Conserving charge, avoiding deep discharges, and using recommended charge cycles will help maximize capacity retention over time.

• Rated capacity: 52Wh (also available in 50Wh variant for some part numbers).
• Voltage: 15.2V to match the laptop’s power requirements.
• Typical lifespan: several hundred cycles; actual hours vary by workload and settings.

What installation and first-use steps should I follow?

Installing the RDSJ battery is like replacing any internal laptop battery: power down, remove old battery per Lenovo service steps, and seat the new pack securely. For best initial conditioning, follow the manufacturer’s recommendation to cycle the battery a few times.

• Before first use: discharge to around 5% (not 0%) then charge up to 95% and repeat 3–4 times.
• Ensure contacts and mounting points are clean and aligned during installation.
• Use your laptop’s power settings to avoid deep discharges and long full charges when not needed.

Is this a safe and genuine replacement battery?

This product is marketed as new from the manufacturer and built with standard Li-ion cells; it includes typical safety characteristics but should be handled like any rechargeable battery. Avoid physical damage, exposure to high heat, or using incompatible chargers to reduce risk.

• Constructed as a lithium-ion battery pack with matched voltage and capacity.
• Replace part numbers listed to ensure you get the correct unit for your laptop.
• Follow safe disposal and recycling rules for lithium batteries at end of life.

Who this is for: Professionals and power users with Lenovo ThinkPad X1 Carbon (2016 / 4th Gen) or X1 Yoga (1st/2nd Gen) laptops who need a reliable, direct-fit replacement battery to restore mobility, extend unplugged productivity, or replace a failing pack. It’s suited for IT technicians replacing batteries in multiple machines and end users comfortable with basic laptop maintenance. If you require guaranteed OEM warranty support, verify compatibility with your service terms before purchase.