Charge Battery•Skill

Is Charge Battery good in Slay the Spire 2?

Charge Battery is a common Defect skill in Slay the Spire 2. In combat it resolves as: Gain 7 Block. Next turn, gain Energy. It currently underperforms most alternatives, sitting at D tier in our Slay the Spire 2 card rankings.

Across 9 recorded runs, decks running it win 0.0% of the time, trailing the 12.6% average by 12.6%. It’s a more selective pick, turning up in just 1.7% of decks that could run it. Defect players keep it in 32.1% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.1 times in the decks that take it.

It performs best next to Beam Cell — together they post a 0.0% swing in win rate. It also has strong chemistry with the relic Cracked Core, which moves its win rate by 0.0%. At 1 energy, it’s upgraded in 10.0% of runs and usually joins the deck around floor 17.

Upgraded, it gains +3 Block, which is why so many decks invest a rest-site upgrade in it. That’s 0 wins, 9 deaths, and 0 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is The Insatiable Boss, which closes out 22.2% of its appearances. Read on for Charge Battery’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Best Cards to Pair with Charge Battery

Ranked by win-rate lift, Charge Battery performs best alongside Beam Cell (0.0%), Bulk Up (0.0%), and Creative AI (0.0%).

Beam Cell0.0%4 runsBulk Up0.0%3 runsCreative AI0.0%3 runsDefend0.0%8 runsDualcast0.0%9 runsBall Lightning0.0%3 runs

Based on small co-occurring samples — treat these as early signals, not final verdicts.

Charge Battery Win Rate by Class

Charge Battery is drafted only by the Defect, where it holds a 0.0% win rate across 9 runs.

The Defectappears in 32.1% of its runs (9 tracked)

Best Relics for Charge Battery

Charge Battery pairs best with the relics Cracked Core (0.0%), Anchor (0.0%), and Permafrost (0.0%), ranked by win-rate lift.

Cracked Core0.0%8 runsAnchor0.0%3 runsPermafrost0.0%3 runs

Based on small co-occurring samples — treat these as early signals, not final verdicts.

Charge Battery Card Details

Charge Battery is a common skill costing 1 energy; it’s upgraded in 10.0% of runs and usually picked up by floor 17.

Gain 7 Block. Next turn, gain Energy.

Upgrade: +3 Block

What Ends Runs with Charge Battery

Charge Battery’s most common run-enders are The Insatiable Boss (22.2%) and Kaiser Crab Boss (22.2%).

• The Insatiable Boss22.2% of runs
• Kaiser Crab Boss22.2% of runs

See Also

Compare Charge Battery with the rest of the best Slay the Spire 2 cards, relics, and classes below.