diff --git a/README.md b/README.md
index 9021d2b7..bf05e318 100644
--- a/README.md
+++ b/README.md
@@ -85,20 +85,45 @@ for row in csv_result:
 
 ### Writes
 
-The [WriteApiClient](https://github.com/bonitoo-io/influxdb-client-python/blob/master/influxdb2/client/write_api.py) supports synchronous, asynchronous and batching writes into InfluxDB 2.0 and could be configured by `WriteOptions`:
+The [WriteApi](https://github.com/bonitoo-io/influxdb-client-python/blob/master/influxdb2/client/write_api.py) supports synchronous, asynchronous and batching writes into InfluxDB 2.0. 
+The data should be passed as a InfluxDB Line Protocol, Data Point or Observable stream. 
+
+_The default instance of `WriteApi` use batching._
+
+#### Batching
+
+The batching is configurable by `write_options`:
 
 | Property | Description | Default Value |
 | --- | --- | --- |
-| [**write_type**](#write_type) | how the client writes data; allowed values: `batching`, `asynchronous`, `synchronous`| `batching` |
 | **batch_size** | the number of data point to collect in batch | `1000` |
 | **flush_interval** | the number of milliseconds before the batch is written | `1000` |
 | **jitter_interval** | the number of milliseconds to increase the batch flush interval by a random amount | `0` |
 | **retry_interval** | the number of milliseconds to retry unsuccessful write. The retry interval is used when the InfluxDB server does not specify "Retry-After" header. | `1000` |
 
-##### write_type
-* `batching` - data are writes in batches defined by `batch_size`, `flush_interval`, ...
-* `asynchronous` - data are writes in asynchronous HTTP request
-* `synchronous` - data are writes in synchronous HTTP request
+
+##### Asynchronous client
+Data are writes in an asynchronous HTTP request.
+ 
+```python
+from influxdb2.client.influxdb_client import InfluxDBClient
+from influxdb2.client.write_api import ASYNCHRONOUS
+
+client = InfluxDBClient(url="http://localhost:9999/api/v2", token="my-token-123", org="my-org", debug=True)
+write_client = client.write_api(write_options=ASYNCHRONOUS)
+```
+
+##### Synchronous client
+
+Data are writes in a synchronous HTTP request.
+
+```python
+from influxdb2.client.influxdb_client import InfluxDBClient
+from influxdb2.client.write_api import SYNCHRONOUS
+
+client = InfluxDBClient(url="http://localhost:9999/api/v2", token="my-token-123", org="my-org", debug=True)
+write_client = client.write_api(write_options=SYNCHRONOUS)
+```
 
 #### How to efficiently import large dataset
 
diff --git a/influxdb2/client/write/point.py b/influxdb2/client/write/point.py
index b6622863..826a9048 100644
--- a/influxdb2/client/write/point.py
+++ b/influxdb2/client/write/point.py
@@ -9,7 +9,7 @@
 from influxdb2.domain.write_precision import WritePrecision
 
 EPOCH = UTC.localize(datetime.utcfromtimestamp(0))
-
+DEFAULT_WRITE_PRECISION = WritePrecision.NS
 
 class Point(object):
     """
@@ -27,9 +27,9 @@ def __init__(self, measurement_name):
         self._fields = {}
         self._name = measurement_name
         self._time = None
-        self._write_precision = WritePrecision.NS
+        self._write_precision = DEFAULT_WRITE_PRECISION
 
-    def time(self, time, write_precision=WritePrecision.NS):
+    def time(self, time, write_precision=DEFAULT_WRITE_PRECISION):
         self._write_precision = write_precision
         self._time = time
         return self
@@ -111,7 +111,7 @@ def escape_value(value):
     return value.translate(str.maketrans({'\"': r"\"", "\\": r"\\"}))
 
 
-def _convert_timestamp(timestamp, precision=WritePrecision.NS):
+def _convert_timestamp(timestamp, precision=DEFAULT_WRITE_PRECISION):
     if isinstance(timestamp, Integral):
         return timestamp  # assume precision is correct if timestamp is int
 
diff --git a/influxdb2/client/write_api.py b/influxdb2/client/write_api.py
index f5ba44c5..965dc038 100644
--- a/influxdb2/client/write_api.py
+++ b/influxdb2/client/write_api.py
@@ -11,9 +11,8 @@
 from rx.scheduler import ThreadPoolScheduler
 from rx.subject import Subject
 
-from influxdb2 import WritePrecision
 from influxdb2.client.abstract_client import AbstractClient
-from influxdb2.client.write.point import Point
+from influxdb2.client.write.point import Point, DEFAULT_WRITE_PRECISION
 from influxdb2.rest import ApiException
 
 logger = logging.getLogger(__name__)
@@ -37,7 +36,6 @@ def __init__(self, write_type=WriteType.batching, batch_size=1_000, flush_interv
         self.write_scheduler = write_scheduler
 
 
-DEFAULT_WRITE_PRECISION = WritePrecision.NS
 SYNCHRONOUS = WriteOptions(write_type=WriteType.synchronous)
 ASYNCHRONOUS = WriteOptions(write_type=WriteType.asynchronous)