5.5 A NEEY 3S Capacitor Balancer Board
EK-C3S5A · 3S
Whole-pack simultaneous balancing for 3S packs, no external supply and no configuration. 45 g on the board.
$49.00
Details →
Whole-pack, zero standby draw from the pack
Capacitor Balancer Board
Every cell balances at the same time
A patented capacitor architecture where the whole battery pack participates in the energy transfer simultaneously instead of one cell pair at a time. No external power supply, no firmware, no app — solder the ribbon, and it runs 24 hours a day on the pack’s own energy.
Mechanism: Capacitor charge-carrier method, whole-pack simultaneous active balancing (Patent ZL 2019 1 1259513.3).
12 models in this line
5.5 A 
5.5 A NEEY 4S Capacitor Balancer Board
EK-C4S5A · 3S – 4S
Whole-pack simultaneous balancing for 3S–4S packs, no external supply and no configuration. 55 g on the board.
$51.15
Details →
5.5 A NEEY 5S Capacitor Balancer Board
EK-C5S5A · 4S – 5S
Whole-pack simultaneous balancing for 4S–5S packs, no external supply and no configuration. 70 g on the board.
$61.77
Details →
5.5 A NEEY 6S Capacitor Balancer Board
EK-C6S5A · 4S – 6S
Whole-pack simultaneous balancing for 4S–5S–6S packs, no external supply and no configuration. 85 g on the board.
$63.31
Details →
5.5 A NEEY 7S Capacitor Balancer Board
EK-C7S5A · 5S – 7S
Whole-pack simultaneous balancing for 5S–6S–7S packs, no external supply and no configuration. 95 g on the board.
$67.92
Details →
5.5 A NEEY 8S Capacitor Balancer Board
EK-C8S5A · 6S – 8S
Whole-pack simultaneous balancing for 6S–7S–8S packs, no external supply and no configuration. 105 g on the board.
$69.46
Details →
5.5 A NEEY 10S Capacitor Balancer Board
EK-C10S5A · 8S – 10S
Whole-pack simultaneous balancing for 8S–9S–10S packs, no external supply and no configuration. 130 g on the board.
$72.54
Details →
5.5 A NEEY 12S Capacitor Balancer Board
EK-C12S5A · 9S – 12S
Whole-pack simultaneous balancing for 9S–10S–11S–12S packs, no external supply and no configuration. 160 g on the board.
$75.62
Details →
5.5 A NEEY 14S Capacitor Balancer Board
EK-C14S5A · 9S – 14S
Whole-pack simultaneous balancing for 9S–10S–11S–12S–13S–14S packs, no external supply and no configuration. 180 g on the board.
$86.38
Details →
5.5 A NEEY 16S Capacitor Balancer Board
EK-C16S5A · 12S – 16S
Whole-pack simultaneous balancing for 12S–13S–14S–15S–16S packs, no external supply and no configuration. 205 g on the board.
$94.08
Details →
5.5 A NEEY 17S Capacitor Balancer Board
EK-C17S5A · 13S – 17S
Whole-pack simultaneous balancing for 13S–14S–15S–16S–17S packs, no external supply and no configuration. 225 g on the board.
$95.62
Details →
5.5 A NEEY 21S Capacitor Balancer Board
EK-C21S5A · 17S – 21S
Whole-pack simultaneous balancing for 17S–18S–19S–20S–21S packs, no external supply and no configuration. 250 g on the board.
$100.23
Details →
Compare within the line
| Specification | EK-C3S5A 3S | EK-C4S5A 3S – 4S | EK-C5S5A 4S – 5S | EK-C6S5A 4S – 6S | EK-C7S5A 5S – 7S | EK-C8S5A 6S – 8S | EK-C10S5A 8S – 10S | EK-C12S5A 9S – 12S | EK-C14S5A 9S – 14S | EK-C16S5A 12S – 16S | EK-C17S5A 13S – 17S | EK-C21S5A 17S – 21S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Supported cell counts | 3S | 3S / 4S | 4S / 5S | 4S / 5S / 6S | 5S / 6S / 7S | 6S / 7S / 8S | 8S / 9S / 10S | 9S / 10S / 11S / 12S | 9S / 10S / 11S / 12S / 13S / 14S | 12S / 13S / 14S / 15S / 16S | 13S / 14S / 15S / 16S / 17S | 17S / 18S / 19S / 20S / 21S |
| Standby current | 9 mA | 9 mA | 7 mA | 7 mA | 7 mA | 7 mA | 15 mA | 15 mA | 15 mA | 15 mA | 17 mA | 18 mA |
| Dimensions | L66 × W35 × T16 mm | L66 × W46 × T16 mm | L69 × W58 × T16 mm | L69 × W69 × T16 mm | L80 × W69.5 × T16 mm | L91 × W70 × T16 mm | L114 × W70 × T16 mm | L137 × W70 × T16 mm | L125 × W80 × T16 mm | L125 × W91 × T16 mm | L125 × W103 × T16 mm | L145 × W130 × T16 mm |
| Weight | 45 g | 55 g | 70 g | 85 g | 95 g | 105 g | 130 g | 160 g | 180 g | 205 g | 225 g | 250 g |