Shreemay Enterprises

• High accuracy voltage detection circuit;
• Using high voltage device charging terminal;
• The built-in three-stage overcurrent detection circuit (overcurrent 1, overcurrent 2, load short circuit);
• The battery charge and discharge can control the MOS transistor.

• Product Description:

  This is 1S 18650 Li-ion Lithium Battery BMS Charger Protection Board for 3.7V Battery.

  Protections:
  1. Short circuit protection
  2. Overcharge protection
  3. Over-discharge protection
  4. Over-current protection
  Pins description:

  P-: negative of input or output power
  P : positive of input or output power
  B-: negative of the battery
  B : positive of the battery

  Features: 
  1. High accuracy voltage detection circuit;
  2. Using high voltage device charging terminal;
  3. The built-in three-stage overcurrent detection circuit (overcurrent 1, overcurrent 2, load short circuit);
  4. The battery charge and discharge can control the MOS transistor.

  Specification:

  Compatibility	Li-ION 3.7V Batteries (18650, 14500)
  Overcharge detection voltage	4.25±0.05V
  Overcharge Lift the voltage	4.23±0.05V
  Over-discharge detection voltage	2.54±0.1V
  Over-current detection current	3A
  Working current	1A
  Shipping Weight	0.01 kg
  Shipping Dimensions	4 × 1 × 1 cm

  Package Includes:

  1 x 1S 18650 Li-ion Lithium Battery BMS Charger Protection Board for 3.7V Battery

• Communication distance: 15KM
• Sensitivity: down to -148dBm
• Programmable bit rates: up to 300kbps
• RSSI dynamic range: 127dB

1. LoRa ™ Spread Spectrum modulation technology
2. Constant RF power output at 20dBm-100mW voltage change
3. Half-duplex SPI communication
4. Supports FSK, GFSK, MSK, GMSK, LoRa ™ and OOK modulation modes
5. Automatic RF signal detection, CAD mode and very high speed AFC
6. Packet engine with CRC up to 256 bytes
7. Small footprint dual-row stamp-hole patch package
8. Shielded housing
9. Spring Antenna

Specification:

1 x LoRa Wireless Spread Spectrum Transmission.

The SX1278 LoRa Module Ra-02 433MHz Wireless Spread Spectrum is a compact RF transceiver board built around SEMTECH’s SX1278 chip, designed for long-range, low-power wireless communication. Operating at 433MHz with LoRa spread spectrum modulation, it achieves reliable data links up to 15 KM in open environments.

This is the Mobile Power Boost DIY 18650 Lithium Battery Digital Dual USB mobile power module Accessories, 18650 Circuit board shell.
Meet the individual needs of your DIY, but you must understand basic electronic assembly. The motherboard comes with protection Charging, overcharge protection, over-discharge protection, overcurrent protection. Intelligent output device after charging full, automatically stop charging, to prevent mobile phones overcharge. Output voltage and current stable, will not harm user devices.

1. USB Output: 5V 2.1A / 5V 1A(Dual USB interface).
2. Charging display: intelligent digital display.
3. Batteries Type: liquid lithium-ion batteries (18650) 3.7 lithium-ion batteries only.
4. Protection circuit: Overcharge protection:4.250V Overcharge protection release: 4.100V.
5. Protection circuit: Over-discharge protection:2.900V Over-discharge protection release: 3.000V.
6. Idle time before LCD switch off: 60secs.