InfoLink's LFP cell average posted its first WoW increase since late July, RMB 3/kWh, but four cost channels arrived in the same week and one print cannot say which of them transmitted. SMM reported 314 Ah prices softening the following day. The movement sits inside the standing RMB 5–7/kWh gap between the two assessment midpoints.
Application Grid
EV cells | No new August 2026 $/kWh benchmark. BNEF's December 2025 survey remains the last reproducible calibration: $99/kWh BEV packs, $81/kWh LFP packs, $128/kWh NMC packs. LG Energy Solution, Samsung SDI, and SK On each disclosed Q2 revenue changes reflecting simultaneous shifts in mix, incentives, customer compensation, and regional volume — LG, Samsung SDI, SK On — which is enough moving parts to make any cell ASP backed out of the revenue line unusable. Direction: indeterminate from public data.
BESS cells | InfoLink, August 26: China 280/314 Ah LFP cells at RMB 0.335–0.390/Wh, average RMB 0.363/Wh ($49.40–57.51/kWh, average $53.53/kWh at August 28 parity of RMB 6.7811/$). Average +0.7% WoW after three weeks flat at RMB 0.360/Wh. SMM, August 27: 314 Ah prices "softened slightly," with no numerical level published. Direction: ambiguous. The two assessors disagree on sign within the same week.
Defense-relevant formats | No public $/kWh benchmark. The DIBC cylindrical-cell solicitation closed without a public award price. Small-format consumer cell pricing and other defense procurement disclosures were checked this week and yielded nothing usable as an adjacent signal.
Pack/system level | InfoLink, August 26: two-hour DC liquid-cooled ESS average RMB 0.49/Wh ($72.26/kWh), flat WoW and unchanged since July 29. One-hour AC average RMB 0.84/Wh; two-hour AC RMB 0.58/Wh; four-hour AC RMB 0.53/Wh — all flat WoW. SMM discontinued three Chinese prismatic pack benchmarks effective August 28, citing project-specific architecture that no longer supports a representative unified assessment. Treat the withdrawal as information: one of the two assessors covering this market has concluded that pack-level pricing has fragmented past the point where a single number means anything.
Four Cost Channels in One Print
Issue #11 closed on a measurement-resolution problem. The modeled lithium impulse into cell cost came to roughly RMB 4.8/kWh — smaller than the RMB 5–7/kWh gap that persistently separates the InfoLink and SMM midpoints for nominally the same product. An impulse that size cannot be distinguished from the difference between the two rulers.
This week's move was RMB 3/kWh. Also smaller. And it landed in a week when four cost channels were active at once, each with its own transmission lag and its own persistence profile. The print is a composite. It does not decompose.
Lithium: decelerating
InfoLink's battery-grade lithium carbonate average over three weeks:
| Date | RMB/MT | WoW change |
|---|---|---|
| Aug 12 | 142,000 | — |
| Aug 19 | 149,000 | +4.9% |
| Aug 26 | 150,000 | +0.3% |
The weekly rate of increase fell 4.6 percentage points across two weeks. If lithium were carrying this cell print on its own, the timing is backwards: the largest carbonate move was two weeks ago, and cell prices did not respond to it, while the smallest move coincides with the increase.
The domestic-versus-seaborne spread stays only partly observable. Fastmarkets' CIF CJK assessment (MB-LI-0029) remains behind the paywall. SMM's own CIF CJK number on August 28 was $19,850/ton against its domestic average of $20,097.70/ton, a domestic premium of approximately $248/ton, or 1.25%. That is an SMM-to-SMM comparison and is not a substitute for the SMM-versus-Fastmarkets spread this section tracks. Fastmarkets' September 1 specification change to MB-LI-0029 will break the series, and historical assessments will not be restated.
Iron phosphate: paused
Iron phosphate ran from approximately RMB 10,000/MT at year-end 2025 to approximately RMB 15,500/MT by mid-August, then stabilized. SMM reported on August 21 that upstream-downstream negotiations had concluded, with non-integrated LFP producers still finding material hard to source and cathode-material inventory at 7–8 days against 10–11 previously. Issue #7 established that this input accounts for over 70% of LFP processing fees, per Hunan Yuneng's disclosure. So the price impulse has stalled while the availability constraint that produced it is still there, visible in the inventory days rather than in the quote.
Electrolyte: accumulating upstream
SMM's August 27 daily feed put domestic LiPF6 at RMB 115,000–123,000/MT with most plants running full and spot circulation tightening. Battery-grade VC (vinylene carbonate) assessed at RMB 237,000/MT in the same daily snapshot; MySteel's August 28 report placed mainstream domestic VC negotiations at RMB 228,000–246,000/MT, acceptance-bill, ex-works.
None of that has reached cell quotes. SMM's August 28 monthly review described finished-electrolyte pricing as only slightly and tentatively higher, with ample nominal blending capacity and cell-maker resistance holding back transmission of the LiPF6, VC, and solvent increases. The persistence profile here is unlike lithium or iron phosphate. The binding constraint on VC is hazardous-chemical production approval, which limits effective capacity regardless of what the price does. Higher prices will not conjure additional permitted capacity on a quarterly timeline, so this channel should be modeled as pressure that keeps building rather than an impulse that spends itself.
Consumption tax: three days out
The State Taxation Administration's August 27 Q&A confirmed that a battery cluster assembled from cells is taxable under the September 1 consumption tax, while a complete ESS — including electrical, thermal, fire-protection, and control systems — is not. Direct battery exports carry the exemption. Whether consumption tax paid on cells embedded in an exported complete ESS can be recovered is not settled; SMM reads recovery as available in principle while flagging filing procedure and working-capital timing as open. What matters commercially is the differential: cells exported directly by the manufacturer are clean, integrated systems are not, and Chinese exporters have an incentive to move where they draw the customs boundary accordingly.
Source Divergence
InfoLink's average rose 0.7% WoW. SMM, a day later, called 314 Ah softer, without publishing a comparable level. InfoLink surveys close to 20 mainstream manufacturers on tax-inclusive transaction prices; SMM's public weekly review offers a direction against a different transaction population. A 0.7% move that two assessors sign differently is not resolvable across the two methodologies — the same limitation this serial has been tracking since Issue #9, now applied to a movement rather than to a level.
Procurement Implications
What the print supports: the flat floor at RMB 0.360/Wh has broken. What it does not support: a sustained reversal of the decline that ran from late Q1 through July. Anyone marking a model to this week's tape should carry the RMB 3/kWh as unresolved rather than as a trend change.
The forward problem is harder, and this next part is editorial assessment rather than sourced fact. Four channels with different lags and different persistence are pressing on the same cell price. Lithium looks like a spent impulse at current levels. Iron phosphate has paused with its availability constraint intact. Electrolyte pressure is accumulating behind a permitting bottleneck that price will not clear. The consumption tax lands September 1. Taken singly, each channel implies a different September trajectory; taken together, and with the September print blending orders struck before and after the tax basis change, the composite becomes less interpretable than it was in July.
Decomposition requires the channels to separate in time. The tax cohorts have to work through the order book before a September or October print can be read as a cost-transmission signal rather than a basis artefact. This week's sidebar covers the cohort mechanics.
- Fastmarkets CIF CJK break: The September 1 methodology change to MB-LI-0029 tightens qualification, volume, and payment-term requirements without restating historical assessments, so the first post-change observation must be treated as a new-basis print rather than a continuation of the prior series.
- ESS export tax recovery: The official Q&A confirms battery-export exemption but does not expressly resolve whether consumption tax embedded in cells can be recovered when the exported customs object is a complete ESS rather than a taxable battery product.
- US import composition shift: S&P Global's trade-data reconstruction showed Q2 US lithium-ion battery imports rebounding 26% QoQ to 215,942 MT with China's non-EV share rising to 66.5%, but the dataset discloses neither GWh, chemistry, compliance state, nor transaction price.
- Fluence contractual exposure: Fluence's minimum purchase commitments rose to $2.913 billion with $396.3 million in potential liquidated damages at June 30, while Q2 gross profit was pressured by customer liquidated damages and battery-price increases — a double-sided contractual squeeze worth tracking as a proxy for integrator escape cost.