China TMK Battery Systems (DFEL) Stock Analysis & Winston Score

China TMK Battery Systems Inc. makes battery systems and related electrical components. The company focuses on energy storage products, primarily serving industrial and commercial customers in China. It operates in the electrical equipment sector, which includes manufacturers that supply power solutions to businesses and infrastructure projects.

The company earns revenue by selling battery systems and parts directly to customers, rather than through subscriptions or licensing. It operates mainly in China, and with a market cap near zero it is a very small company by global standards. Its gross margin of around 23% suggests modest pricing power, but small size and heavy reliance on a single geographic market create real concentration risk. The biggest challenge the company faces is competing against much larger, better-funded battery manufacturers in China, including companies backed by the Chinese government, which makes it difficult to grow market share or defend its current position.

Winston Score History

Growth Profile

For growth stock investors

When traditional metrics don't capture the full picture, these are the signals growth stock investors use instead.

Revenue Growth

>+1,000% YoY

YoY Growth Rate

Revenue accelerating

EPS Growth

>+1,000% YoY

YoY Growth Rate

EPS growth accelerating

R&D Spend

$0/ year

0.0% of revenue

Below sector average (4%)

Research and development spending

Insider Activity

45.8%ownership

→ Flat

Insiders holding steady — not selling despite ability to

Cash Runway

~0 months

$498 cash & investments

Quarterly Free Cash Flow

Short runway — potential dilution ahead through share issuance

Revenue accelerating

China TMK Battery Systems grew revenue 3145% year-over-year and the growth rate is speeding up. That's the kind of momentum growth investors look for — the question is whether margins can follow.

The Winston Score above measures business quality today. Growth stocks often score lower because they invest in the future rather than maximising current profits. These metrics show what matters most for evaluating that future.

Share count broadly stable

+0.0% over 4y

The share count has stayed roughly flat over this period — little dilution or buyback activity.

Diluted shares outstanding: 15.1M (2021) → 15.1M (2025)

Score breakdown

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Quality

Gross Margin

16.0%

Thin — 16.0% gross margin

Operating Margin

15.9%

Healthy — 15.9% operating margin

ROCE

3.0%

Weak — 3.0% return on capital

ROIC between 0% and 5%. They earn a few cents back per dollar invested in the business.

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Growth

Sales YoY

+1782.1%

Fast-growing sales (1782.1% YoY)

EPS YoY

N/A

—

Data not available

EPS Consistency

6/8 quarters

Earnings grew in most of the last 8 quarters

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Cash Flow

Cash Conversion

1%

Weak — only 1% of profit becomes cash

FCF Margin

-0.1%

Burning cash (-0.1%)

Free cash flow is negative. They are burning cash, not generating it.

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Stability

Debt / Equity

N/A

Data not available

Interest Cover

109889.50x

Comfortably covers interest (109889.5x)

Interest coverage above 8. Profits cover interest many times over.

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Valuation

P/E Ratio (TTM)

19.4x

Fair value — P/E 19.4

P/E in the normal range. Price is roughly $15 for every $1 of yearly profit.

P/E vs Forward

N/A

not available

Data not available

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Dividends

Not applicable for this business.

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