Product Description

Welcome to ANTIEE

We are a manufacturer specializing in various laptop batteries and tablet batteries. We emphasizes the basic product concept of high-quality, safety and reliability. ANTIEE Laptop batteries are 100% DIRECT from Manufacturer with over 10 years' Laptop Battery Production experience.

We are always working hard to ensure high quality laptop battery standards through multiple quality checks. With multi-protections such as short circuit, overheat, and overload.ANTIEE promises to deliver each customer to valuable, efficient and reliable battery. Let your notebook get more freedom.

SPECIFICATION

  • Battery Model: B21N1818-3
  • Voltage: 7.7V
  • Capacity: 32Wh 4380mAh
  • Battery Type: Li-ion
  • Condition:100% Brand New. Directly ship from US warehouse.

PACKAGE INCLUDES:

  • 1 X Battery
  • 2 X Tools

REPALCE PART NUMBER

  • C21N1818 C21N1818-3 B21N1818 B21N1818-3

COMPATIBLE LAPTOP MODELS(use "Ctrl+F" to find your model quickly)

  • Asus VivoBook D409 D409B D409BA D409D D409DA D409DJ D409DL Series
  • Asus VivoBook M409 M409B M409BA M409D M409DA M409DJ Series
  • Asus VivoBook F409 F409DA F409J F409JA F409JB F409F F409FA F409FB F409FJ F409U F409UA F409UB Series
  • Asus VivoBook A409 A409DA A409M A409MA A409F A409FA A409FB A409FJ A409J A409JA A409JB A409JP Series
  • Asus VivoBook X409 X409DA X409BA X409F X409FA X409FB X409FL X409FJ X409J X409JA X409JB X409JP X409M X409MA Series
  • Asus VivoBook D509 D509B D509BA D509D D509DA D509DJ D509DL Series
  • Asus VivoBook M509 M509B M509BA M509D M509DA M509DJ Series
  • Asus VivoBook F509 F509DA F509J F509JA F509JB F509F F509FA F509FB F509FJ F509U F509UA F509UB Series
  • Asus VivoBook A509 A509DA A509M A509MA A509F A509FA A509FB A509FJ A509J A509JA A509JB A509JP Series
  • Asus VivoBook X509 X509DA X509BA X509F X509FA X509FB X509FJ X509FL X509J X509JA X509JB X509JP X509M X509MA Series

Preparation Before Installing a New Battery

  1. First check if the battery is the same size as your original battery after receiving it.
  2. Before disassembling your laptop, put the old battery charge below 25%.
  3. We recommend that you search for battery removal tutorials on the Internet in advance, or seek help from a professional technician. We won't responsible for any damage due to improper operation.
  4. When installing the battery, pay attention to whether the battery cable is fixed. If the battery cable is not installed correctly, the battery may not be charged.

Common Troubleshooting Methods

Why doesn't your laptop detect the battery or display the battery level properly after installing the battery?

  • Could be caused by battery loose. Please check whether the battery cable is installed properly.
  • May be due to conductive material damaged which the laptop motherboard and battery anode and cathode contact position, you can try to confirm it with your original battery.
  • Check whether the battery drive is in normal condition, if not, download the corresponding driver software to update.

Laptop Battery Manual

  • New battery: Discharge the new battery to 10% (not 0%), then charge it to 100%. Cycle 3-5 times to activate its maximum capacity before use.
  • Overuse: Do not run out of battery power to 0%, the lithium battery will turn on the charge protection so that it can not be recharged, which is the nature of lithium batteries.
  • Long-term storage: Charge it to around 50% when you store it long term. (Charge it once a month) Do not store at low power to prevent reduce the lifespan of a battery.
  • Adapter: Always use the proper ac adapter charger for your device.