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ECH-100 Two-Way Radio Chargers for KNB-14A

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compatible radio：KNB-14A,KNB-20N,KNB-15A,KNB-21N,KNB-16A,KNB-17A,KNB-22N,PB-43N TK-3107 TK-278G TK-3107G TK-2107 TK-378G TK-388 TK-260 TK-261 TK-360 TK-270 TK-370 TK-278 TK-378 TK-2107G TK-238 TK-270G TK-272 TK-278 TK-338 TK-372 TK378G TK-2100 TK-2102 TK-3100 TK-3101 TK-3102 TK-385 TK-280 TK-290 TK-380 TK-390 TK-480 TK-481 TH-K2AT TH-K2E TH-K2ET TH-K4AT TH-K4E TH-255A

Description：Single rapid charger Charge battery or battery attached to the radio. Switching power supply Charging current rate: 1A Fully protected against overload, Short‐circuit against accidental continuous shorting of any charge contacts.

compatible models：

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PRODUCT INFORMATION

ECH-100 1A Switching Power Supply Two-Way Radio Charger for KENWOOD KNB-14A KNB-15A KNB-16A KNB-17A KNB-20N KNB-21N KNB-22N PB-43N TK-3107 TH-K2AT TH-K4AT | Enpower

ECH-100 1A Switching Power Supply Two-Way Radio Battery Charger for KENWOOD KNB-Series and PB-43N Battery Packs

Enpower ECH-100 industrial single-bay rapid charger specifically engineered for KENWOOD two-way radio batteries. Universally compatible with KNB-14A, KNB-15A, KNB-16A, KNB-17A, KNB-20N, KNB-21N, KNB-22N and PB-43N Ni-MH / Ni-CD battery packs, and supports charging the battery either standalone or attached to the host radio. Built-in universal switching power supply accepts 100-240V AC input at 50/60Hz for global deployment, delivering a stable 1A rapid charging current. Fully protected against overload and accidental continuous short-circuit of any charge contacts, with intuitive LED indicators for power, charging, full charge and fault status. Compatible with KENWOOD TK and TH series portable radios using the above battery packs. CE / FCC / RoHS certified, manufactured in Guangdong China with 12-month quality warranty.

Basic Product Information

Brand Name

Enpower

Model No.

ECH-100

Product Type

Two-Way Radio Battery Charger

Applicable Battery Models

KNB-14A / KNB-15A / KNB-16A / KNB-17A / KNB-20N / KNB-21N / KNB-22N / PB-43N

Battery Chemistry

Ni-MH / Ni-CD

AC Input Voltage

100-240V AC, 50/60Hz (Universal)

Power Supply Type

Switching Power Supply

Charging Current

1A (Rapid Charge)

Charging Mode

Single Bay (Battery Standalone or Attached to Radio)

Protection Functions

Overload Protection, Short-Circuit Protection

LED Indicator

Power / Charging / Full Charge / Fault

Operating Temperature

0 degrees C to +45 degrees C

Storage Temperature

-20 degrees C to +70 degrees C

Place of Origin

Guangdong, China

OEM / ODM

Available

Warranty Period

12 Months

Compatible Two-Way Radio Models (using above battery packs)

TK-3107, TK-278G, TK-3107G, TK-2107, TK-378G, TK-388, TK-260, TK-261, TK-360, TK-270, TK-370, TK-278, TK-378, TK-2107G, TK-238, TK-270G, TK-272, TK-338, TK-372, TK-378G, TK-2100, TK-2102, TK-3100, TK-3101, TK-3102, TK-385, TK-280, TK-290, TK-380, TK-390, TK-480, TK-481, TH-K2AT, TH-K2E, TH-K2ET, TH-K4AT, TH-K4E, TH-255A

Certification

CE / FCC / RoHS Compliant

Compatible Battery Models

The ECH-100 single bay rapid charger supports the following KENWOOD KNB-series and PB-series two-way radio battery packs:

KNB-14A KNB-15A KNB-16A KNB-17A KNB-20N KNB-21N KNB-22N PB-43N

Compatible Two-Way Radio Models

ECH-100 charges the KNB-series and PB-43N battery packs used in the following KENWOOD portable radios. Battery may be inserted standalone or attached to the radio directly:

TK-3107 TK-278G TK-3107G TK-2107 TK-378G TK-388 TK-260 TK-261 TK-360 TK-270 TK-370 TK-278 TK-378 TK-2107G TK-238 TK-270G TK-272 TK-338 TK-372 TK-2100 TK-2102 TK-3100 TK-3101 TK-3102 TK-385 TK-280 TK-290 TK-380 TK-390 TK-480 TK-481 TH-K2AT TH-K2E TH-K2ET TH-K4AT TH-K4E TH-255A

Operation & LED Indicator Description

Operation Steps:

1. Plug the charger into a 100-240V AC outlet.

2. Insert the KNB-series or PB-43N battery pack into the charging bay — either standalone or with the battery still attached to the radio.

3. The LED indicator displays the charging status as below:

Charger Working Status	LED Power Light Display
Power connection	Red / Green flash for 1 second
Without battery	No light
Charging in progress	Solid Red light
Battery fully charged	Solid Green light
Battery or charger function failure	Red light flashing

Product Description & Core Advantages

✅ Universal Switching Power Supply 100-240V AC
Built-in high-efficiency switching power supply accepts 100-240V AC at 50/60Hz for global deployment without voltage adapter, suitable for USA, Europe, Asia, and Middle East markets out of the box.

✅ Charge Battery Standalone or Attached to Radio
Versatile single bay design accepts the KENWOOD KNB-14A / 15A / 16A / 17A / 20N / 21N / 22N / PB-43N battery either by itself or while still attached to the host radio, eliminating the need to unmount the battery before every charge cycle.

✅ 1A Rapid Charge with Full Safety Protection
Stable 1A rapid charging current dramatically shortens turnaround time, while integrated overload and short-circuit protection guards against accidental continuous shorting of any charge contacts — extending overall battery service life.

⭐ Broad KENWOOD Compatibility — Supports 8 KNB-series and PB-series battery packs used across 37 TK-series and 6 TH-series KENWOOD portable radios (see compatibility list above).
⭐ Dual Chemistry Support — Compatible with both Ni-MH and Ni-CD battery chemistries, perfect for mixed fleet operations and legacy radio deployments.
⭐ Intuitive LED Status — Clear Red / Green LED indication distinguishes power connection, charging in progress, fully charged and fault conditions at a glance.
⭐ Wide Operating Range — Operating temperature 0 degrees C to +45 degrees C, storage -20 degrees C to +70 degrees C, ready for indoor workshop and field deployment.
⭐ Industrial-Grade Certification — CE / FCC / RoHS compliant, OEM / ODM customization welcomed, manufactured in Guangdong China under strict QC with 12-month warranty.

Related Two-Way Radio Chargers

Safety Cautions

⚠ Do not disassemble or modify the charger housing — risk of electric shock, fire or equipment damage.
⚠ Use only with KENWOOD KNB-series or PB-43N Ni-MH / Ni-CD battery packs. Do not attempt to charge unsupported battery models or other chemistries (Li-ion, LiFePO4, lead-acid).
⚠ Do not short-circuit the charger output contacts, and keep them clear of metal objects such as coins, keys and clips while the charger is powered.
⚠ Do not expose the charger to water, rain or condensing humidity, and do not operate it in flammable / explosive atmospheres.
⚠ Disconnect the charger from AC power when not in use for extended periods, and store in a cool dry place within -20 degrees C to +70 degrees C.

Frequently Asked Questions

Q1: Which KENWOOD two-way radio battery models can be charged with the ECH-100?-

A: The ECH-100 rapid charger supports the following 8 KENWOOD Ni-MH / Ni-CD battery packs: KNB-14A, KNB-15A, KNB-16A, KNB-17A, KNB-20N, KNB-21N, KNB-22N and PB-43N. These batteries are used in 37 TK-series radios (TK-3107 / 378G / 388 / 260 / 261 / 270 / 360 / 370 / 278 / 378 / 2107G / 238 / 270G / 272 / 338 / 372 / 378G / 2100 / 2102 / 3100 / 3101 / 3102 / 385 / 280 / 290 / 380 / 390 / 480 / 481 and others) and 6 TH-series radios (TH-K2AT / K2E / K2ET / K4AT / K4E / 255A).

Q2: Can the battery be left on the radio while charging?+

A: Yes. The ECH-100 single bay accepts the KENWOOD KNB-series and PB-43N battery packs either as a standalone battery or while still attached to the host radio. This eliminates the need to unmount the battery for every charge cycle and is especially useful for fleet operations with shared radios.

Q3: What does the 1A rapid charging current mean in terms of charge time?+

A: The 1A rapid charge current typically brings a fully depleted 1500-2000mAh Ni-MH battery to 80 percent capacity in 90-120 minutes, and a full charge to 100 percent in approximately 2.5-3 hours. Actual charge time depends on residual capacity, cell age, and ambient temperature. Trickle charging keeps the battery topped up once full charge is reached.

Q4: Does the charger support global voltage inputs, and do I need a voltage converter?+

A: Yes. The built-in universal switching power supply accepts 100-240V AC at 50/60Hz, which covers every global mains standard (US 120V/60Hz, EU 230V/50Hz, UK 230V/50Hz, AU 230V/50Hz, JP 100V/50-60Hz). No voltage converter is required — only a plug adapter for the destination country socket is needed.

Q5: What is the meaning of the different LED indicator states?+

A: The LED indicator shows four states: (1) Red/Green flash for 1 second after power-on indicates mains power connected; (2) No light means no battery detected in the bay; (3) Solid Red light means charging in progress; (4) Solid Green light means battery fully charged; (5) Red light flashing means battery or charger function failure — remove the battery and inspect for short-circuited contacts, damaged cells, or excessive temperature before retrying.