Fix a typo (#1451)

seperately should be separately

docs/docs/Gear Up/edison.md

@@ -149,7 +149,7 @@ The Explorer Boards have battery charger circuitry on board, making it easy to u
 * For people in the UK, you may find you have to shop around to find the correct battery, as shipping restrictions appears to have reduced the supply somewhat. [Pimoroni](https://shop.pimoroni.com/products/lipo-battery-pack) appear to stock the same Adafruit 2000mAh battery as mentioned above. Another source looks to be [Cool Components](https://www.coolcomponents.co.uk/en/lithium-polymer-battery-2000mah.html), but you may find shipping costs expensive. CAUTION: [RS Online](https://uk.rs-online.com/mobile/p/lithium-rechargeable-battery-packs/1251266/) sell a similar battery, but unfortunately it comes with the wrong JST connector (it comes with a 2.5mm JST XHP-2, and you need a 2mm JST PH). It is possible, however, to buy the [right connectors](https://www.technobotsonline.com/jst-ph-2mm-2-way-housing-excludes-female-pins.html) and fit them yourself (numerous 'how to' videos on YouTube).
 * For people in Australia you can find 2000mAh, 2200mAh and 2500mAh batteries from [Little bird electronics](https://www.littlebirdelectronics.com.au/batteries/), prices are very competitive and shipping is quick. These are the same Adafruit batteries that can be obtained from the US above.
 
-**Note**: It's best to buy from a reputable supplier, because if the internal two cells are mismatched the Explorer board cannot charge them seperately and they are prone to catching fire. Make sure that it *includes a protection circuit* to protect over-discharge. **NEVER** connect the battery to an Explorer board the wrong way round. There is no manufacturing standard so never assume correct polarity. The connector JP1 on the Explorer Block has two terminals. The left side is positive, the right side is negative. The side with the JP1 label is the positive side. Typically a battery's red wire is the positive wire.  Ideally you want a battery that has a 10k ohm thermistor for temperature protection by the Edison too.
+**Note**: It's best to buy from a reputable supplier, because if the internal two cells are mismatched the Explorer board cannot charge them separately and they are prone to catching fire. Make sure that it *includes a protection circuit* to protect over-discharge. **NEVER** connect the battery to an Explorer board the wrong way round. There is no manufacturing standard so never assume correct polarity. The connector JP1 on the Explorer Block has two terminals. The left side is positive, the right side is negative. The side with the JP1 label is the positive side. Typically a battery's red wire is the positive wire.  Ideally you want a battery that has a 10k ohm thermistor for temperature protection by the Edison too.
 
 You can also use any charger with a USB plug, including a wall power charger. The Explorer boards have pass through charging, so this is also how you will charge the LiPo battery.