01AV430 11.52V 57Wh ThinkPad X1 Carbon 5th Gen 6th Gen Battery | Factory-Direct Supply

Q1: The 01AV430, 01AV429, 01AV431, and 01AV494 are all listed as compatible with the same devices. How should a buyer decide which P/N to order?

A1: The four P/Ns are the same physical battery — the suffix numeral in the 01AV4xx family identifies the cell manufacturer source used in that production batch, not any difference in voltage, capacity, connector, or BMS profile. All four fit the X1 Carbon 5th Gen (20HQ / 20HR / 20K3 / 20K4) and 6th Gen (20KG / 20KH) type code ranges identically. The Lenovo EC reads chemistry ID and design capacity from EEPROM during authentication — it does not distinguish between the four suffix variants. For parts ordering, the P/N that appears on the original battery label inside the device is the most direct reference, but any of the four may be ordered interchangeably against the same device population.

Q2: Some listings show this battery at 11.52V and others at 11.58V. Does the voltage difference affect compatibility with the ThinkPad X1 Carbon 5th and 6th Gen?

A2: No compatibility difference exists between the two voltage figures — they describe the same 4-cell Li-ion battery under different rounding conventions. lenovobatt.com explicitly documents that 11.52V and 11.58V are in common use for this line and are interchangeable. For import declarations and purchase order documentation, 11.52V is the nominal that aligns most closely with the majority of specialist parts source records. A buyer purchasing on either stated voltage receives the same physical battery.

Q3: Does the 01AV430 fit the ThinkPad X1 Carbon 4th Gen (2016) or the 7th Gen (2019)?

A3: Neither. The 4th Gen X1 Carbon (2016, type codes 20FB / 20FC) uses the 00HW028 / 00HW029 battery family with a different connector and form factor. The 7th Gen (2019) and later use the L18-series or L20-series battery lines — different voltage, different P/N family, and a different physical connector than the 01AV430. The 01AV430 line covers the 5th Gen (2017) and 6th Gen (2018) only. For accounts stocking batteries across multiple X1 Carbon generations, each generation boundary requires a separate parts line — they cannot be substituted across these breaks.

Q4: After installing a new 01AV430, the battery indicator in Windows shows full charge but the device shuts down unexpectedly at around 20% reported capacity. What is the cause?

A4: This is a battery gauge calibration issue on the X1 Carbon platform rather than a hardware defect. The ThinkPad EC stores the previous battery’s charge curve as the discharge reference baseline, and a new battery with a different actual capacity profile can cause the gauge to misreport the charge state until the EC recalibrates. Run the battery down to below 5% under normal operating load — do not force shutdown — then charge fully to 100% without interruption and restart. The EC recalculates the discharge curve against the new battery’s actual capacity after this first complete cycle, and the unexpected shutdown behavior resolves. If the issue persists after two conditioning cycles, reseat the battery connector.

Q5: We source batteries for a mixed X1 Carbon fleet that spans 5th, 6th, and 7th Gen units. Can mixed-SKU orders combining 01AV430 units for the older generations and L18-series P/Ns for the 7th Gen be submitted together?

A5: Mixed-SKU orders covering both battery lines — 01AV430 for X1 Carbon 5th/6th Gen and the L18-series (02DL006 / L18C4P71) for X1 Carbon 7th/8th Gen — are processed from the same stock under a single consolidated purchase order. A wholesale reseller or fleet parts buyer does not need to submit a separate order per battery family or per device generation. List the P/Ns with their respective generation ranges and directional quantities, include the destination country, and contact us for a consolidated distributor price covering the full multi-generation order.

Q6: Is the 57Wh capacity on the 01AV430 the only option for the X1 Carbon 5th and 6th Gen, or does a lower-capacity variant exist?

A6: 57Wh is the only capacity option for the X1 Carbon 5th and 6th Gen. Unlike some ThinkPad models that shipped with two Wh tiers, the 01AV-series for these generations has no lower-capacity variant in OEM documentation or in specialist parts records. The 01AV429, 01AV430, 01AV431, and 01AV494 all describe the same 57Wh battery — there is no 45Wh or 51Wh option for this chassis. Buyers do not need to verify a capacity tier when ordering for these two specific generations; the 57Wh unit is the correct choice for any X1 Carbon 5th or 6th Gen regardless of configuration.