L18L3P73 11.55V 51Wh ThinkPad T490 T495 P43S T14 P14S Battery | Wholesale Price

OEM P/N: L18L3P73 (SB10K97645 / 02DL007 / 5B10W13905 / SB10T83148); cross-references L18M3P73 (SB10K97646 / 02DL008), L18M3P74 (SB10K97647 / 02DL009), L18C3P71 (SB10K97648 / 02DL010), L18C3P72 (SB10T83122), L18M4P73, L18M4P74, 5B10W13954
Specs: 11.55V · 51Wh · ~4345–4372mAh · Li-ion · Black — 51Wh OEM replacement battery (11.52V appears in some listings — same battery, alternate voltage rounding)
Compatibility: ThinkPad T490, T495, P43S; ThinkPad T14 Gen 1 / Gen 2; ThinkPad P14S Gen 1 / Gen 2 — not compatible with T490S or T495S
Distributor note: Cross-brand sourcing note — this L18L3P73 line can be ordered on the same purchase order as HP and Dell battery P/Ns from the same supplier; from stock; mixed orders welcome
Capacity tier: 51Wh standard unit; a 57Wh higher-capacity variant (L18L3PD1 / L18M3PD1 / L18M3PD2 series, 11.58V) exists for the T490S / T495S platform — different connector, not interchangeable

Product Description

he L18L3P73 covers five ThinkPad product lines — T490, T495, P43S, T14 Gen 1, and P14S Gen 1, with Gen 2 variants of both T14 and P14S drawing from the same battery family — under a single 51Wh stock position. For procurement buyers maintaining a mixed enterprise portfolio that includes both mainstream T-series and workstation-class P-series ThinkPad devices, this P/N line removes the need for separate battery SKUs across those product boundaries.

The T490 and T495 represent the high-volume commercial anchor of this platform generation, with significant active fleet presence in corporate IT refresh cycles globally. The P43S and P14S workstation-series models sit in the same battery ecosystem, meaning a depot stocking L18L3P73 against a T490 refresh program automatically carries coverage for P43S and P14S units in the same account without additional SKU overhead.

A sourcing boundary buyers must account for: the T490S and T495S slim-series models are not compatible with this P/N — they use the L18L3PD1 / L18M3PD1 line at 11.58V 57Wh with a different connector. Procurement teams managing fleets that include both standard and slim T490-generation devices must stock these as two separate battery lines, and the T490S battery must not be treated as interchangeable with this 51Wh unit.

Technical Parameters

Parameter	Detail
Battery Model	L18L3P73
Compatible Part Numbers	L18L3P73 · SB10K97645 · 02DL007 · SB10W51925 · 5B10W51826 · SB10T83148 · 5B10W13905 · L18M3P73 · SB10K97646 · 02DL008 · SB10W51926 · 5B10W51827 · SB10T83149 · 5B10W13906 · L18M3P74 · SB10K97647 · 02DL009 · SB10W51927 · SB10W51828 · SB10T83150 · 5B10W13907 · L18C3P71 · SB10K97648 · 02DL010 · SB10W51928 · SB10W51829 · SB10T83151 · 5B10W13908 · L18C3P72 · SB10T83122 · 5B10W13877 · 5B10W13954 · L18M4P73 · L18M4P74
Brand Compatibility	Lenovo
Voltage	11.55V nominal (some listings show 11.52V — alternate rounding of same 3-cell Li-ion spec)
Capacity	~4345–4372mAh
Energy	51Wh
Cell Type	Li-ion
Cell Configuration	3-cell
Color	Black
Condition	Unused, OEM-compatible — new stock
Cycle Life	~500 cycles
Certifications	CE · RoHS · UN38.3
Warranty	12 months
Package Includes	1 × L18L3P73 replacement battery
Compatible Laptop Models	ThinkPad T490 (20N2 / 20N3 / 20Q9 / 20QH / 20RY / 20RX) · ThinkPad T495 (20NJ / 20NK) · ThinkPad P43S (20RH / 20RJ) · ThinkPad T14 Gen 1 (20S0 / 20S1 / 20S2 / 20S3 / 20UD / 20UE) · ThinkPad T14 Gen 2 (20W0 / 20W1 / 20XK / 20XL) · ThinkPad P14S Gen 1 (20S4 / 20S5 / 20Y1 / 20Y2) · ThinkPad P14S Gen 2 (20VX / 20VY / 21A0 / 21A1) · Not compatible with T490S, T495S — those use L18L3PD1 / L18M3PD1 series (11.58V 57Wh, different connector)
Application	Replacement laptop battery — wholesale distribution, field service supply, institutional procurement
Supply Type	Wholesale supply · Mixed orders accepted · Stock available

Need a stable supply plan? Send your model list + quantities + destination. We’ll confirm lead time, shipping method, and compliance documents before you place the order.

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Features & Advantages

✅ 🔋 Fleet Cost Consequence of 51Wh Cell Architecture on T490/T14 Platforms

At the fleet level, the cost argument for a verified 51Wh replacement hinges on avoiding a second battery intervention within the same device refresh cycle. T490 and T14 Gen 1 units deployed in 2019–2020 are now in their fourth and fifth service years — the point at which battery degradation in under-spec replacements typically accelerates and drives unplanned service calls. Grade-A Li-ion cells in this battery rated to approximately 500 cycles, when installed at year three of a five-year fleet life, cover the remaining deployment window in full without requiring a second replacement event before the device reaches end of service.

✅ 🖥️ Seven-Model Coverage Across T-Series and P-Series ThinkPad Lines

A single L18L3P73 stock position covers ThinkPad T490, T495, P43S, T14 Gen 1, T14 Gen 2, P14S Gen 1, and P14S Gen 2 — seven device types spanning mainstream commercial and workstation-class product lines from the same connector and form factor. ThinkPad T14 Gen 1 and Gen 2 type codes confirmed in this range: 20S0–20S3 and 20UD/20UE (Gen 1), 20W0/20W1 and 20XK/20XL (Gen 2). The L18-series P/Ns (L18L3P73, L18M3P73, L18M3P74, L18C3P71, L18C3P72) and the L18M4-series cross-references are all physically interchangeable within this device population.

✅ ⚙️ EC Authentication Pattern and BMS Response on ThinkPad T490 Platform

ThinkPad T490 firmware sequences the EC battery query before completing POST — a replacement battery presenting an out-of-range design voltage or capacity value to the EEPROM read causes Lenovo Vantage to flag the battery as unrecognized and suppresses charge initiation without generating a BIOS beep or visible POST error, making the fault appear as a charging adapter problem to first-line support. This battery’s BMS places overcharge threshold management and over-discharge cutoff as the twin primary protection layers, with short-circuit interrupt and thermal ceiling as secondary functions — all profiled to the T490 EC’s expected EEPROM parameter set. BMS alignment to ThinkPad T490 platform tolerances allows the EC authentication sequence to clear on first insertion without a power-cycle workaround.

✅ 📦 Sample-to-Volume Escalation Path for T490 and T14 Fleet Procurement

Enterprise accounts evaluating a new battery supplier for an active T490 or T14 fleet typically require a qualification stage before committing to a standing replenishment order — internal IT approval processes, Lenovo Vantage compatibility verification, and procurement authorization cycles can all delay a volume commitment. This L18L3P73 replacement battery line supports sample orders ahead of volume commitment, allowing procurement teams to complete qualification testing on production units before escalating. Wholesale orders at low MOQ are available once qualification is complete, with mixed-SKU ordering supported across T-series and P-series lines on the same replenishment purchase order.

✅ 🌍 T490S Boundary as a Cross-Brand Sourcing Efficiency Point

Parts platforms and distributor catalogs frequently list the T490S battery under the same product entry as the T490 — a catalog error that generates return and reorder cycles for buyers who discover the incompatibility post-shipment. Sourcing through a supplier who explicitly documents the T490S boundary, stocks the T490S battery line (L18L3PD1 / L18M3PD1 / L18M3PD2, 11.58V 57Wh) as a separate catalog item, and accepts mixed-SKU orders combining both lines eliminates that error point in the procurement workflow. For accounts managing fleets that span both standard and slim T490-generation devices, both battery lines can be consolidated on the same purchase order.

Packing & Delivery

Lead Time & Shipping

In-stock items: Ship within 3 days
For standard replacement models with available inventory.
Mass production orders: Ship within 7 days
For regular models under confirmed specifications and packaging requirements.
Customized orders: Ship within 15 days
For custom cell configuration, size, wire/connector, PCB/BMS, labeling, or packaging.

Note: Final dispatch time depends on total quantity, model complexity, packaging requirements, and shipping compliance documents. We will confirm the estimated shipping date (ETD) after order confirmation.

Available shipping methods:

Air freight (urgent, smaller volume)
Sea freight (cost-effective for bulk)
Rail / Truck (subject to destination)
Express channels

Compliance & Documents:

Documents available: UN38.3 / MSDS / Transport Test Report (if applicable)
Compliant packaging and carton labeling can be arranged based on the chosen shipping method.

Shipping terms:

EXW / FOB / CIF / DDP available

FAQ

Q1: The L18L3P73 and L18M3P73 are both listed for the T490 and T14. Is there a technical difference between them, or does ordering either one satisfy the same demand?

A1: The two P/Ns describe the same physical battery. Within the L18-series family, the middle letter of the assembly code — L, M, C — identifies the cell manufacturer source for that production batch. L18L3P73, L18M3P73, L18M3P74, and L18C3P71 all specify the same 11.55V 51Wh 3-cell Li-ion battery; the letter variant reflects which cell supplier was used during manufacture, not any difference in voltage, capacity, connector, or BMS profile. The ThinkPad EC reads chemistry ID and design capacity from the battery EEPROM — it does not differentiate between cell-source variants. Any P/N in the L18L / L18M / L18C family on this cross-reference list is interchangeable at the device level for all confirmed compatible models.

Q2: Several listings for this battery show 11.52V and others show 11.55V. Which is correct for a parts purchase order or customs declaration?

A2: 11.55V is the nominal voltage documented in specialist parts sources and lenovobatt.com for the L18L3P73 line. The 11.52V figure in some listings is an alternate rounding of the same 3-cell Li-ion chemistry — both describe the same battery. For customs declarations, import documentation, and purchase orders requiring a stated design voltage, 11.55V is the value that aligns with specialist parts database records. The 0.03V difference does not indicate a specification variant and has no effect on device compatibility or EC authentication.

Q3: Does this battery fit the ThinkPad T14 Gen 2, or only the Gen 1?

A3: Both Gen 1 and Gen 2 are confirmed in this compatibility range. ThinkPad T14 Gen 1 type codes 20S0–20S3 and 20UD/20UE, and T14 Gen 2 type codes 20W0/20W1 and 20XK/20XL, are all covered by the L18L3P73 line. The same applies to P14S: Gen 1 (20S4 / 20S5 / 20Y1 / 20Y2) and Gen 2 (20VX / 20VY / 21A0 / 21A1) are both within the compatible range. This two-generation span is frequently absent from competitor product listings, which often list only the T490 and T495, leaving T14 Gen 2 and P14S Gen 2 buyers to source the battery separately — they can use this P/N without a separate stock line.

Q4: After installing a new L18L3P73, Lenovo Vantage shows the battery as unrecognized and charging does not begin. What is the diagnostic sequence?

A4: The most common cause is incomplete EC registration on the initial insertion. Disconnect the AC adapter, hold the power button for 15 seconds to discharge residual capacitor voltage from the system board, then reconnect the adapter and power on. If Lenovo Vantage still shows the battery as unrecognized after this cycle, open a command prompt as administrator, run powercfg /batteryreport, and check whether the report logs a design capacity value for the new battery — if it does, the battery is communicating with the EC and the Vantage display will normalize after one full charge-discharge cycle. If no design capacity appears in the report, reseat the battery connector and repeat.

Q5: We need to place a replenishment order covering L18L3P73 units for a T490 fleet alongside T490S battery P/Ns for the slim-model devices in the same account. Can a procurement manager combine both on one order?

A5: Both battery lines can be submitted on a single consolidated purchase order. The L18L3P73 (51Wh, 11.55V, for standard T490 / T495 / T14 / P14S) and the T490S battery line (L18L3PD1 / L18M3PD1, 57Wh, 11.58V) are stocked separately and documented as distinct catalog items — the connector and form factor differences mean they cannot be mixed at the device level, but they can be combined on the same parts order with no minimum per line. A procurement manager submitting a mixed order should list each P/N with its device series and directional quantity; contact us directly and we return a consolidated volume price for the full order.

Q6: Why do some P/Ns in the L18-series cross-reference list start with 5B10W or SB10T rather than L18? Are those the same battery?

A6: Yes, they are the same battery documented under Lenovo’s parallel numbering systems. The L18-series codes (L18L3P73, L18M3P73, etc.) are the battery assembly P/Ns used in aftermarket parts references and on the battery label. The 5B10W-series codes (5B10W13905, 5B10W13906, etc.) are Lenovo FRU numbers used in the hardware maintenance manual parts lists. The SB10K-series (SB10K97645, SB10K97646) and SB10T-series codes are Lenovo’s internal supply chain references for the same units. All three naming families refer to the same physical battery and are interchangeable for the purposes of parts ordering. Knowing both the assembly P/N and the FRU code for the same battery avoids duplicate ordering when a parts list is compiled from multiple source documents.