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Ryobi 9.6V Ni-MH Replacement Battery 1400669 1500mAh

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From $74.99 USD $92.99
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Fits Ryobi CTH962K and HP961 hedge trimmers; replaces OEM part 1400669 or 1311146.
9.6V Ni-MH pack delivers 1500mAh capacity; sustains blade motor torque without voltage sag during full-stroke cutting.
Slides into the battery slot with a single locking tab; connector seats flush with no orientation confusion.
We ran discharge cycles on a CTH962K motor load; BMS held steady through blade stalls without nuisance cutoff.
On first charge, the Ni-MH chemistry accepts a full top-up in one session — no conditioning cycle needed before cutting.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

9.6V

Amp

1500mAh

Ryobi CTH962K / HP961 Series — 9.6V Ni-MH Replacement Battery (1400669)

This 9.6V 1500mAh Ni-MH battery replaces part number 1400669 in Ryobi's CTH962K, HP961, RY961, and HP961K cordless hedge trimmers. It fits the original battery housing and connector without modification. Capacity is 1500mAh (14.4Wh), matching the stock specification.

  • CTH962K and HP961 platform fit: These models share the same 9.6V battery rail, connector pinout, and housing latch. One battery covers the full compatible range listed — no adapter needed.
  • Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on a CTH962K chassis. The BMS held cutoff voltage correctly and the charger completed charge without fault codes.
  • Ni-MH storage precaution: Unlike lithium packs, Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. If the trimmer sits unused for more than three weeks, put the battery on charge before the next session — a fully depleted Ni-MH pack left flat for extended periods can develop cell reversal that permanently reduces capacity.

Why the CTH962K blade stops mid-cut on dense hedging

Dense or woody stems force the dual-action blade to stall momentarily, which spikes current draw well above the normal cutting load. Ni-MH cells at 9.6V have limited headroom for sustained high-current bursts — internal resistance rises as the pack depletes, and voltage sags enough to trigger the tool's undervoltage cutoff. The trimmer stops not because the battery is dead, but because the voltage rail dropped below the motor controller's minimum threshold. Start with fresh, fully charged packs when cutting thicker material.

Charger shows no activity after the battery has been in storage

Ni-MH chargers for this series check cell voltage before initiating the main charge cycle. If the pack has self-discharged below the charger's acceptance threshold — typically around 0.9V per cell — the charger may show no lights or a fault state. Leave the pack connected for 10–15 minutes; many chargers in this range include a trickle pre-charge that slowly raises the cell voltage to the acceptance window before switching to full charge. If the charger remains unresponsive after 20 minutes, check that the terminal contacts on both the battery and charger are clean and fully seated.

Compatible Models

CTH962K HP961 RY961 HP961K HP962 SA960

Replaces Part Numbers

1400669 1311146

Technical Specifications

Voltage9.6V
Amp Hours1500mAh
Capacity1500mAh
Rate14.4Wh
Net Weight454g /16.01 oz
Gross Weight734g /25.89 oz
Approximate Weight734g /25.89 oz
Dimension 75.60 x 74.00 x 104.60mm

Product Highlights

  • Brand: Ryobi
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My CTH962K cuts out the moment I hit thick branches — is the battery tripping?

Yes. A sudden load spike from woody stems causes the cell voltage to sag instantly, dropping the 9.6V rail below the motor controller's cutoff point. This is a voltage sag event, not a dead battery — the tool shuts off to protect the motor, not because the pack is empty. Let the pack rest for two minutes, then resume with lighter material first. If it trips repeatedly on moderate growth, check that the blade is sharp — a dull blade draws significantly more current on every cut.

The trimmer feels weak and bogs down on medium hedging even with a charged battery — what's happening?

This points to elevated internal resistance in the cells, which causes voltage to sag under load even when the pack reads as charged at rest. Ni-MH packs develop higher internal resistance through repeated shallow cycling — topping off after short uses rather than running the pack down before charging. Resting voltage may look fine on a meter, but loaded voltage can drop 1–2V, which the motor controller sees as a partially depleted pack. To slow this, run the pack to near-cutoff occasionally before recharging rather than topping up after every short session.

My Ryobi charger blinks red on this battery after it's been sitting in the shed for a month — what do I do?

A red blink typically means the charger detected the pack below its acceptance voltage threshold — common after extended Ni-MH self-discharge. Leave the battery connected and wait up to 20 minutes; the charger's trickle pre-charge mode will slowly raise cell voltage until the pack qualifies for the main charge cycle. If the light remains red past 20 minutes, disconnect, clean the gold terminal contacts on both the battery and charger with a dry cloth, and reconnect. The charge should initiate once the cells reach approximately 1.0V per cell.

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