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Hello!

你好！

Recently I needed bike lights for my bike.

最近我的自行车需要自行车灯。

And I remembered that I already had rechargeable bike lights that I bought ten years ago, that I hadn’t tried in a long time.

我记得我已经有了十年前买的可充电自行车灯，但我已经很长时间没有尝试过了。

I tried to recharge them, but after fully charging them, they only worked for maybe 5 minutes before they turned off again.

我尝试给它们充电，但充满电后，它们只工作了大约 5 分钟就再次关闭。

I don’t know much about electronics, but I’ve been curious about whether it’s possible to fix old electronics for a long time, and this seemed like the perfect repair project because I might just need to replace the battery.

我对电子产品了解不多，但我一直很好奇是否可以修复旧电子产品，这似乎是一个完美的修复项目，因为我可能只需要更换电池。

So I went to the local queer makerspace where I’m a member to use the soldering iron and try to do it!

所以我去了当地的酷儿创客空间，我是那里的会员，使用烙铁并尝试这样做！

I don’t know much about electronics and this post does not contain any safety advice because I don’t know much about safety.

我对电子产品了解不多，这篇文章不包含任何安全建议，因为我对安全了解不多。

I think it’s nice to do projects in a community space where you can get help.

我认为在社区空间中做项目很好，在那里你可以获得帮助。

The bike light felt like it was made of silicone, so I cut open the silicone in a haphazard way along something that vaguely looked like a seam.

自行车灯感觉像是由硅胶制成的，所以我沿着看起来像接缝的东西随意地切开硅胶。

I definitely ripped some silicone in the process and it was pretty messy but I got it open and found the circuit board.

我确实在这个过程中撕破了一些硅胶，这非常混乱，但我把它打开并找到了电路板。

I don’t know the model number of the bike lights but there’s a photo of them at the end of the post.

我不知道自行车灯的型号，但帖子末尾有一张它们的照片。

There were some screws attaching things together so I removed them so I could get the circuit board out.

有一些螺丝将东西连接在一起，所以我把它们拆下来，这样我就可以取出电路板。

Mostly I tried to remove as few screws as possible because I was worried about losing them or not being able to put them back after.

大多数情况下，我尝试尽可能少地卸下螺丝，因为我担心丢失它们或之后无法将它们装回去。

I probably put the screws in a bag or something.

我可能把螺丝放在袋子或其他东西里。

You can see where the battery is attached, I think it’s left of RI3 and above Q2.

你可以看到电池安装的位置，我认为是在 RI3 的左侧和 Q2 的上方。

Here’s what the battery looked like: step 4: desolder the battery I’d never desoldered anything before, so I found the iFixit guide to desoldering and read it.

电池如下所示： 步骤 4：拆焊电池 我以前从未拆焊过任何东西，所以我找到了 iFixit 拆焊指南并阅读了它。

Also I asked my friends Lee and Lauria for advice.

我还向我的朋友 Lee 和 Lauria 寻求建议。

In the picture of the battery in Step 3, you can see it says something like “3” and “LI???77”.

在步骤 3 的电池图片中，您可以看到上面写着“3”和“LI???77”之类的内容。

There’s a piece of metal that I think is welded or something to the top of the battery.

我认为电池顶部焊接了一块金属或其他东西。

It seemed impossible and also maybe not smart to try to remove so I wasn’t sure how to find out what an “LI????77” was or how to order another one.

尝试删除似乎是不可能的，而且可能也不明智，所以我不确定如何找出“LI???77”是什么或如何订购另一个。

I’ve been trying to avoid using LLMs (though I will not get into that because I am exhausted by LLM discourse and I’m sure you are too), but I really had no idea how to figure out what the battery was so I asked an LLM.

我一直在努力避免使用法学硕士（尽管我不会深入讨论这个问题，因为我已经被法学硕士的讨论搞得筋疲力尽了，我相信你也是如此），但我真的不知道如何弄清楚电池是什么，所以我问了法学硕士。

It gave the response “LIR2477”, which (when I looked it up) looked exactly the same as my battery so I figured that was plausible.

它给出了响应“LIR2477”，（当我查找时）它看起来与我的电池完全相同，所以我认为这是合理的。

I would be interested to learn non-LLM ways to figure this out though.

我有兴趣学习非法学硕士的方法来解决这个问题。

There must be a way.

一定有办法的。

Lauria showed me how to use DigiKey’s search which was very cool though DigiKey didn’t have that part.

Lauria 向我展示了如何使用 DigiKey 的搜索，这非常酷，尽管 DigiKey 没有该部分。

(edit: someone in the replies told me that this kind of coin cell battery is named according to its dimensions, and you can use plastic calipers to measure the dimensions of the battery.

（编辑：回复中有人告诉我，这种纽扣电池是根据尺寸命名的，可以用塑料卡尺测量电池的尺寸。

So I guess a non-LLM way would be to measure the battery with calipers and try to match it to something on the List of battery sizes Wikipedia page, though that page only mentions CR 2477 and not LIR 2477.

因此，我想非 LLM 的方法是用卡尺测量电池，并尝试将其与维基百科电池尺寸列表页面上的内容进行匹配，尽管该页面仅提到 CR 2477 而不是 LIR 2477。

It’s a good example of what’s fun for me about trying to avoid LLMs, this “List of battery sizes” page is super interesting and if I use an LLM I might never find it)

这是一个很好的例子，说明了我尝试避免法学硕士的乐趣，这个“电池尺寸列表”页面非常有趣，如果我使用法学硕士，我可能永远找不到它）

I went to AliExpress and ordered: 2 batteries (I had 2 bike lights and I wanted to fix them both) some silicone glue to glue things back together I think the batteries were $3 each and the glue was $8.

我去 AliExpress 订购了： 2 块电池（我有 2 个自行车灯，我想把它们都修好）一些硅酮胶，用于将东西粘在一起，我认为每个电池 3 美元，胶水 8 美元。

The parts took maybe 2 weeks to arive, and once they arrived, I went back to the makerspace and:

这些零件大约花了两周时间才到达，一旦到达，我就回到创客空间并：

Then after waiting some amount of time for the glue to dry I took it home and waited 24 hours for the glue to cure.

然后等胶水干了一段时间后，我把它带回家，等了 24 小时让胶水固化。

The lights work!

灯工作了！

I have used them to bike at night!

我晚上用它们骑自行车！

I still haven’t needed to recharge them (and tragically I had to order a new Mini USB cable because I got rid of all my Mini USB cables, so I’m still waiting for that), so I still don’t know for sure how long the lifetime of the new battery will be.

我仍然不需要给它们充电（不幸的是，我不得不订购一条新的 Mini USB 数据线，因为我扔掉了所有的 Mini USB 数据线，所以我仍在等待），所以我仍然不确定新电池的使用寿命有多长。

Here’s what the light looks like after re-gluing.

这是重新粘合后灯的样子。

You can see that I didn’t glue very carefully.

你可以看到我粘得不太仔细。

It didn’t really go back together that well but I’m hoping it’ll be good enough.

它并没有真正恢复得那么好，但我希望它会足够好。

I thought it was really cool that I was able to do this with extremely minimal electronics skills!

我觉得用极少的电子技能就能做到这一点真是太酷了！

It cost about $20 CAD to buy the parts, and (whether or not the repair holds up, I’ll try to update this post in the future!), it was fun to try to repair something and learn something new.

购买零件花费了大约 20 加元，而且（无论修复是否成功，我以后都会尝试更新这篇文章！），尝试修复一些东西并学习新的东西很有趣。