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Small black rectangular circuit board with micro USB port and solder pads, 27mm by 17mm

Forest Grass USA

Forest Grass USA TP4056 5V 1A Lithium Battery Charger Board TE585

SKU CH-HW9B-4A3AV

A compact 27 mm × 17 mm module charges single-cell lithium batteries at up to 1000 mA from a 5 V micro-USB source and stops at 4.2 V with 2.5 V over-discharge and 3 A over-current protection

  • ColorBlack
  • SizeMedium
  • Charges single-cell lithium packs at up to 1000 mA from a 5 V micro USB supply
  • Stops charging automatically at 4.2 V ±1 % to protect cell life
  • Cuts power if voltage drops to 2.5 V preventing deep discharge damage
  • Limits output current to 3 A for short-circuit and over-current safety
  • Compact 27 mm × 17 mm board fits tight project enclosures

Charging board for single-cell lithium packs

The module accepts 5 V through a micro USB socket and manages charge termination at 4.2 V with a 1000 mA current limit. Over-discharge protection activates at 2.5 V and over-current protection at 3 A. The 27 mm by 17 mm board is intended for DIY projects that need a compact, standalone charger.

Micro USB input with 5 V supply

Power comes from any standard phone charger or USB port via the on-board micro USB connector; solder pads are also provided for a wired 5 V source. The fixed 1 A charge rate suits small-capacity cells and cannot be adjusted on this board.

Red and green LEDs show charge status

A red LED illuminates while charging and a green LED signals completion, giving immediate visual feedback without extra components. No battery, cables or documentation are included, so the builder must supply a compatible single-cell lithium pack and verify wiring before use.

Highlights

  • Charges single-cell lithium packs at up to 1000 mA from a 5 V micro USB supply
  • Stops charging automatically at 4.2 V ±1 % to protect cell life
  • Cuts power if voltage drops to 2.5 V preventing deep discharge damage
  • Limits output current to 3 A for short-circuit and over-current safety
  • Compact 27 mm × 17 mm board fits tight project enclosures

Specifications

ColorBlack
SizeMedium

Questions about this item

What does the 1000 mA maximum charging current mean for a lithium cell in practice?

It sets the top charge rate at 1 A, so a 1000 mAh cell would reach full in roughly one hour under ideal conditions.

What does the micro USB input cap in real use?

The micro USB port limits input to 5 V, so the board cannot draw more than the 1 A charge current regardless of the wall adapter used.

Will the 27 mm by 17 mm board fit inside a standard project enclosure?

At 27 mm long and 17 mm wide it fits most small enclosures; allow a few millimetres extra for the micro USB connector and wiring.

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